CN108069998B - Synthetic method of penem drug intermediate - Google Patents

Synthetic method of penem drug intermediate Download PDF

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CN108069998B
CN108069998B CN201711488067.4A CN201711488067A CN108069998B CN 108069998 B CN108069998 B CN 108069998B CN 201711488067 A CN201711488067 A CN 201711488067A CN 108069998 B CN108069998 B CN 108069998B
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penem
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CN108069998A (en
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熊春华
张玉红
韩晓祥
刘占祥
赵国标
徐旋
杨伟强
徐建忠
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Zhejiang University ZJU
Zhejiang Hisoar Pharmaceutical Co Ltd
Zhejiang Gongshang University
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Zhejiang Hisoar Pharmaceutical Co Ltd
Zhejiang Gongshang University
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    • C07F7/00Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02Silicon compounds
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Abstract

The invention discloses a synthesis method of a penem drug intermediate, which takes (R) -3-hydroxybutyrate as a raw material to prepare the penem drug intermediate 4-AA, and the raw material in the route is cheap and easy to obtain and can be purchased in large quantities. The method has the advantages of simple steps, high yield of each step and simple reaction. Chiral reagents are not needed, chiral resolution is omitted, and the method has the advantages of low cost, high yield and easily obtained reaction conditions.

Description

Synthetic method of penem drug intermediate
Technical Field
The invention relates to a synthesis method of an intermediate in the technical field of medicines, in particular to a synthesis method of a penem medicine intermediate.
Background
4-AA, namely (3R,4R) -3- [ (R) -1-tert-butyl dimethyl silica ethyl ] -4-acetoxyl-2-azetidinone, is an important intermediate of penem and carbapenem antibiotics such as synthetic imipenem (imipenem), panipenem (panipenem), meropenem (meropenem), faropenem (faropenem), ertapenem (ertapenem), biapenem (biapenem) and doripenem (doripenem), penem and carbapenem are novel atypical β -lactam antibiotics successfully developed in 20 th century in 80 th century, have broad-spectrum strong antibacterial action on gram negative and positive bacteria, aerobic bacteria and anaerobic bacteria, are stable to β -lactamase, have good antibacterial action on cephalosporin drug-resistant bacteria, are the first-choice drugs for treating severe infections and multiple infections, and are one of hot spots of antibacterial drugs.
The 4-AA has 3 chiral carbon atoms in the structure, so 8 stereoisomers exist, and how to stereoselectively construct β -lactam ring is the key and difficult point of synthesis.
At present, the main total synthesis route of 4-AA can be summarized into the following five main production routes by classifying different raw materials:
the first method uses 6-aminopenicillanic acid (6-APA) as a raw material, but the route is not suitable for industrial production due to too high raw material cost and too low total yield.
The second method uses 3-hydroxybutyrate as a starting material, but the total yield of the route is low, and the cost is high.
The third method uses methyl acetoacetate as a starting material and uses (R) -BINAP-Ru as a chiral catalyst, and has relatively high price because a noble metal catalyst is used.
The fourth method takes chiral 1, 3-butanediol as a starting material, and is a better industrial route which is mainly adopted by Japanese enterprises, but the raw material is not produced at home and is not suitable for industrial mass production at home.
And the fifth method takes the L-threonine as a starting material, the raw materials of the route are convenient and easy to obtain, the reaction conditions are easy, and the method is suitable for industrial production, but the preparation, separation and purification of intermediates are difficult, and a large amount of lead tetraoxide and cerium nitrate are used as oxidants, so that the defects of heavy metal pollution and the like are caused.
Therefore, in order to solve the problems in the prior art, a synthetic route which is low in cost, environment-friendly and suitable for large-scale production is urgently needed to be found.
Disclosure of Invention
In order to overcome the defects, especially the defects of heavy metal pollution and low yield, the invention provides a synthetic method of a penem drug intermediate, and compared with other routes, the synthetic route has the advantages of easily obtained raw materials, stable and mild reaction conditions in each step, and avoids the use of chiral reagents.
The technical scheme adopted by the invention is as follows:
a synthetic method of a penem drug intermediate comprises the following steps:
(1) taking (R) -3-hydroxybutyric acid ester as a raw material, and reacting with N, N-dimethylformamide dimethyl acetal to obtain an intermediate A shown in a formula (I);
Figure BDA0001535104300000021
(2) carrying out substitution reaction on the intermediate A and p-anisidine to obtain an intermediate B shown as a formula (II);
Figure BDA0001535104300000031
(3) under the action of a catalyst, carrying out chiral hydrogenation reduction reaction on the intermediate B and hydrogen to obtain an intermediate C shown in a formula (III);
Figure BDA0001535104300000032
(4) hydrolyzing the intermediate D shown in the formula (IV) by the intermediate C;
Figure BDA0001535104300000033
(5) under the alkaline reagent, the intermediate D carries out ring closing reaction to obtain an intermediate E shown in a formula (VI);
Figure BDA0001535104300000041
(6) under the action of an acid binding agent, reacting the intermediate E with tert-butyldimethylsilyl chloride to obtain an intermediate F shown in a formula (VI);
Figure BDA0001535104300000042
(7) removing a protecting group on nitrogen from the intermediate F under the action of an oxidant to obtain an intermediate G shown as a formula (VII);
Figure BDA0001535104300000043
(8) under the catalysis of ruthenium trichloride, reacting the intermediate G with peroxyacetic acid to obtain 4-AA shown in a formula (VIII);
Figure BDA0001535104300000044
wherein R is methyl or ethyl.
The synthetic route of the invention is as follows:
Figure BDA0001535104300000051
the (R) -3-hydroxybutyrate is (R) -3-hydroxybutyrate methyl ester or (R) -3-hydroxybutyrate ethyl ester.
In the step (1), performing condensation reaction on (R) -3-hydroxybutyrate, N-dimethylformamide dimethyl acetal and a reaction solvent at the temperature of 30-150 ℃ for 1-5 h, washing, separating liquid, and concentrating to obtain an intermediate A, wherein the intermediate A is directly used for the next reaction without further treatment;
wherein the molar ratio of (R) -3-hydroxybutyrate to N, N-dimethylformamide dimethyl acetal (DMF-DMA) is 1: 0.5 to 2, preferably, the molar ratio of (R) -3-hydroxybutyrate to DMF-DMA is 1: 1.5;
in the step (1), the reaction solvent is one or a mixture of methyltetrahydrofuran, toluene, benzene, dichloromethane and acetonitrile in any proportion, preferably, the reaction solvent is methyltetrahydrofuran, the solubility of the raw material (R) -3-hydroxybutyrate in the methyltetrahydrofuran is better, and a higher-concentration (R) -3-hydroxybutyrate solution is beneficial to forward reaction;
preferably, in the step (1), the reaction temperature is 70-120 ℃, and the reaction time is 1-3 h.
In the step (2), mixing the intermediate A with a reaction solvent, dropwise adding a p-anisidine solution, reacting for 2-5 hours at 30-120 ℃, heating to recover a byproduct, filtering, washing, and drying to obtain an intermediate C;
wherein the p-anisidine solution is prepared from p-anisidine and a corresponding reaction solvent, and the concentration is 0.3-1.0 mol/L;
the molar ratio of the intermediate A to the p-anisidine is 0.5-2: preferably, the molar ratio of the intermediate A to the p-anisidine is 0.5-1: 1;
in the step (2), the reaction solvent is one of toluene, methanol, acetonitrile, benzene, dichloromethane and tetrahydrofuran or a mixture thereof in any proportion, preferably, the reaction solvent is toluene;
preferably, in the step (2), the reaction temperature is 80-110 ℃, the reaction time is 2-5 h, and the yield is highest under the condition.
In the step (3), mixing a catalyst, an intermediate B and a reaction solvent, filling 1-6 MPa of hydrogen into each mol of the intermediate B, and carrying out a manual hydrogenation reduction reaction at 30-100 ℃ for 3-10 h to obtain an intermediate C;
the catalyst is ruthenium-based catalyst, such as RuBr2[(R)-BINAP],RuCl2[(R)-BINAP]2·N(C2H5)3,[RuCl(C6H6)((R)-BINAP)]Cl, etc., preferably, the catalyst is RuCl2[(R)-BINAP]2·N(C2H5)3RuCl, in contrast to other ruthenium-based catalysts2[(R)-BINAP]2·N(C2H5)3N (C) in (1)2H5)3The affinity with the intermediate B at a chiral position is strong, the activation energy can be effectively reduced in the reaction, and the optical selectivity can be well improved by utilizing the structural selectivity of the catalyst at the chiral site;
the using amount of the catalyst is 3-10% of the molar amount of the intermediate B; preferably, the amount of the catalyst is 5-8% of the molar amount of the intermediate B;
in the step (3), the reaction solvent is one of methanol, ethanol, dichloromethane, acetonitrile, toluene and chloroform or a mixture thereof in any proportion, preferably, the reaction solvent is dichloromethane;
preferably, in the step (3), the reaction temperature is 30-60 ℃ and the reaction time is 3-6 h.
In the step (4), the intermediate C, alkali and a reaction solvent are subjected to hydrolysis reaction at 30-100 ℃, and are acidified, filtered and dried after reacting for 1-3 hours to obtain an intermediate D;
wherein the molar ratio of the intermediate C to the alkali is 0.5-2: 1;
the alkali is sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide or sodium ethoxide, the alkali strength of the alkali can obviously influence the reaction, the influence on the hydrolysis degree of the raw materials is great, and the hydrolysis reaction can be smoothly carried out only by selecting proper alkali; preferably, the alkali is sodium carbonate, and the alkalinity of the sodium carbonate is moderate, so that the hydrolysis reaction of the intermediate C is facilitated.
In the step (4), the reaction solvent is one or a mixture of DMF, DMAC and pyridine in any proportion;
preferably, in the step (4), the reaction temperature is 70-100 ℃, and the reaction time is 1-3 h.
In the step (5), the alkaline reagent is a mixture of triphenylphosphine and 2, 2' -dipyridyl disulfide or triethylamine, preferably, the alkaline reagent is triethylamine;
in the step (5), the intermediate E and an alkaline reagent are mixed, a reaction solvent is added, the mixture reacts for 10-24 hours at the temperature of 30-120 ℃, and the intermediate E is obtained through post-treatment. Wherein the reaction solvent is one of methyl tetrahydrofuran and acetonitrile or a mixture of methyl tetrahydrofuran and acetonitrile in any proportion; preferably, the reaction solvent is acetonitrile.
In the step (6), the acid-binding agent is triethylamine, imidazole or 4-N, N-dimethylaminopyridine, and the reaction is carried out in a reaction solvent at the temperature of 30-100 ℃ for 8-15 h, wherein the reaction solvent is one of N, N-Dimethylformamide (DMF), dichloromethane and chloroform or a mixture of the DMF and the dichloromethane in any proportion.
In the step (7), the oxidant is ozone or ammonium ceric nitrate, and the reaction is carried out in a reaction solvent, wherein the reaction solvent is one of methanol, acetonitrile and acetone or a mixture of methanol, acetonitrile and acetone in any proportion.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a new 4-AA synthetic route, and the raw materials of the route are cheap and easy to obtain and can be purchased in large quantities.
(2) The method has the advantages of simple steps, high yield of each step and simple reaction.
(3) Chiral reagents are not needed, chiral resolution is omitted, and the method has the advantages of low cost, high yield and easily obtained reaction conditions.
Detailed Description
The present invention is further illustrated by the following examples, but the scope of the invention is not limited to the examples.
Example 1
A new synthesis method of a penem drug intermediate (3R,4R) -3- (R) -1-tert-butyl dimethyl silica ethyl ] -4-acetoxyl-2-azetidinone (short for 4-AA) comprises the following steps:
(1) synthesis of intermediate A
5.9kg of (R) -3-hydroxybutyric acid methyl ester, 7.1L of DMF-DMA and 10L of Methyltetrahydrofuran (MTHF) were charged in a reaction vessel, stirred, and reacted at 90 ℃ under reflux for 3 hours, after which the reaction vessel was cooled to room temperature. 10L of distilled water was added and the mixture was washed 3 times. And (3) separating, namely recovering MTHF from the upper organic layer at 70 ℃ under reduced pressure, wherein the recovered MTHF can be recycled, and the obtained foam is the intermediate A which is not required to be treated and is directly used in the next step. The reaction yield in this step was 95%.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR:1.18(m,3H,CH3),3.25(m,6H,N(CH3)2),3.31(q,J=2.4,1H,CH),3.71(s,3H,CH3),4.90(m,lH,OC-CH=),5.14(m,1H,OH),7.62(m,1H,C=CH-N).13C-NMR:171.54,153.81,155.25,140.90,114.21,62.65,61.94,52.08,44.25,21.83.IR(KBr):v 3415,2974,2849,2621,1741,1703,1652,1366,1332,1301,1244,1186,1129,1081,1023,981,921,829,805cm-1
(2) synthesis of intermediate B
Adding 3kg of the intermediate A into a reaction kettle, adding 5L of toluene serving as a solvent, dropwise adding 2L of p-anisidine toluene solution with the concentration of 0.5mol/L at room temperature, stirring and heating to 60 ℃, and carrying out heat preservation reaction for 4 hours after dropwise adding is finished for 1 hour. After the reaction is finished, cooling to 0 ℃, performing suction filtration, leaching the filter cake with cold methanol, and drying to obtain white crystals with the yield of 90.8%.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR:1.18(m,3H,CH3),3.31(q,J=2.4,1H,CH),3.71(s,3H,CH3),3.85(s,2H,CH2-N),4.90(m,lH,OC-CH=),5.14(m,1H,OH),6.91(m,2H,CH),7.15(m,2H,CH),7.62(m,1H,C=CH-N).13C-NMR:170.42,161.84,153.25,139.03,130.90,114.21,65.65,53.26,55.81,21.83.(KBr):v 3409,2976,2844,2621,1744,1713,1650,1589,1509,1455,1365,1339,1301,1249,1188,1131,1086,1021,979,913,835,801cm-1
(3) synthesis of intermediate C
3kg of intermediate B, 7L of dichloromethane were added to the reaction kettle, and 100g of RoCl was added2[(R)-BINAP]2·N(C2H5)3And carrying out asymmetric chiral hydrogenation reduction reaction with hydrogen at 50 ℃, wherein the pressure of the hydrogen is 4 MPa. The reaction was carried out for 5 hours, after which the temperature was lowered to 0 ℃ and the mixture was filtered and the resulting clear liquid was distilled under reduced pressure leaving a white solid as the desired intermediate C. The yield was 93%, and the ee value was 96.1%.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR:1.19(m,3H,CH3),3.31(q,J=2.4,1H,CH),3.71(s,3H,CH3),3.85(s,2H,CH2-N),3.94(s,3H,CH3),4.14(m,1H,OH),4.50(m,lH,OC-CH),6.95(m,2H,CH),7.04(s,lH,NH),7.15(m,2H,CH).13C-NMR:178.54,155.25,135.90,117.16,114.21,75.65,62.94,55.25,52.08,21.83.(KBr):v 3410,2966,2848,2625,2523,1741,1709,1589,1511,1452,1361,1348,1305,1246,1190,1133,1080,1022,966,923,831,799cm-1
(4) synthesis of intermediate D
1.75kg of intermediate C and 6kg of Na were added to the reaction kettle2CO3And 5L of DMF, stirring, heating to 80 ℃, and keeping the temperature for reaction for 2 hours. Hot filtration, cooling the filtrate to 5 ℃, adding hydrochloric acid to acidify to pH 5 to give a white solid, filtration, and drying of the filter cake to give 1.57kg of white solid as intermediate D. The yield thereof was found to be 95.4%.
Obtained intermediate D for1H-NMR,13C-NMR and FT-IR measurements gave the following data:1H-NMR:1.17(m,3H,CH3),3.31(q,J=2.4,1H,CH),3.61(s,3H,CH3),3.85(s,2H,CH2-N),4.14(m,1H,OH),4.50(m,1H,OC-CH),5.14(m,1H,OH),6.91(m,2H,CH),7.07(m,2H,CH).13C-NMR:175.54,153.25,130.90,115.16,114.21,75.65,62.94,55.25,55.08,21.83.(KBr):v 3425,2936,2858,2615,1743,1712,1589,1514,1448,1365,1342,1300,1246,1200,1138,1079,1024,968,927,835,802cm-1
(5) synthesis of intermediate E
1kg of intermediate D was added to the reaction vessel, an equimolar amount of triethylamine was added, 20L of acetonitrile was added, the mixture was dissolved, the mixture was heated to 80 ℃ and reacted with stirring for 15 hours, and the result was monitored by TLC. After the reaction was completed, it was cooled to room temperature. The solvent was recovered by distillation under reduced pressure at 60 ℃ and the residual oil was purified by recrystallization to give intermediate E in 92% yield and 97% purity by HPLC.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR:1.21(m,3H,CH3),3.35(q,J=2.4,1H,CH),3.71(s,3H,CH3),4.05(s,2H,CH2-N),4.14(m,1H,OH),4.50(m,1H,OC-CH),6.91(m,2H,CH),7.15(m,2H,CH).13C-NMR:173.54,163.87,135.90,118.16,114.21,69.05,61.54,54.25,52.28,21.53.(KBr):v 3405,2956,2846,2610,1733,1711,1592,1514,1445,1363,1337,1300,1256,1193,1128,1075,1014,958,925,867,833,795cm-1
(6) synthesis of intermediate F
3L of DMF and 0.5kg of intermediate E are sequentially added into a reaction kettle, stirred uniformly and cooled to the temperature of minus 8 ℃. Slowly dripping 0.25kg of imidazole and 0.25kg of tert-butyldimethylsilyl chloride again, keeping the temperature for reacting for 45min after finishing dripping 45min, heating to 80 ℃, and reacting for 10h at the temperature. The extent of reaction of the compounds was monitored by TLC during this period. After the reaction was completed, 3L of water was added under stirring, and extracted three times with 500mL of chloroform, and the organic phases were combined. The organic phase is washed three times by 1L saturated saline solution, and is dried for 24 hours under reduced pressure to obtain a crude product. Recrystallization from methanol-water solution gave F as a gray solid with a yield of 91%.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR 0.06(s,3H,CH3),0.07(s,3H,CH3),0.76(s,9H,C(CH3)3),1.27(d,J=6.0Hz,3H,CH3),3.40(s,1H,CH),3.77(s,3H,CH3),3.11(t,J=2.4,lH,CH),3.76(s,2H,CH2-N),6.83(d,J=9.2,2H,CH),7.25(d,J=9.2,2H,CH).13C-NMR:175.13,164.20,156.17,130.47,117.87,114.20,64.16,62.82,55.43,51.99,25.58,22.39,17.78,-4.20,-5.02.(KBr):v 2954,2936,2855,1751,1586,1502,1434,1384,1365,1337,1289,1256,1209,1155,1138,1071,1024,968,925,823cm-1.
(7) synthesis of intermediate G
Adding 4L of methanol and 1.50kg of intermediate F into a reaction kettle, introducing ozone (the mass concentration of the ozone is 25-26 mg/L), starting to add 1.35kg of sodium thiosulfate and 8kg of water, controlling the temperature below 5 ℃, and then adding 0.45kg of thiourea (after 1 hour of addition is finished). After the reaction is finished, the material is pumped into a concentration kettle to begin vacuum distillation to recover methanol, after the distillation is finished, 10kg of water is added, and the mixture is cooled, crystallized and dried to obtain 0.95kg of intermediate G with the yield of 93.1%.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR:0.07-0.06(d,J=6.0,6H,Si(CH3)2),0.86(s,9H,C(CH3)3),1.19(d,J=6.4,3H,CH3),2.04(s,3H,CH3),3.11(t,J=2.4,lH,CH),3.53(s,2H,CH2-N),7.04(s,lH,NH).13C-NMR:170.7,166.4,74.9,64.8,63.7,25.6,20.8,20.5,17.8,-4.4,-5.1.IR(KBr):v 3203,2955,2929,2856,1782,1745,1387,1365,1339,1290,1251,1214,1143,1107,1074,1029,978,900,822,790cm-1.
(8) synthesis of 4-AA
Dissolving 0.78kg of the intermediate G obtained in the previous step in a mixed solvent composed of 2L of dichloromethane, 1L of acetic acid and 1L of acetonitrile, and adding 42G of RuCl3As a catalyst. Controlling the temperature at 0 ℃, continuously dropwise adding 2.5L of acetic acid solution of peroxyacetic acid with the concentration of 1mol/L under stirring, monitoring the reaction process by TLC, after the reaction is finished, distilling and concentrating the product under reduced pressure at 30 ℃, adding saturated salt water to wash for 3 times after the reaction is finished, distilling and concentrating under reduced pressure, recrystallizing to obtain white crystals, and passing through a silica gel column to obtain 0.87kg of 4-AA with the yield of 93.3%. HPLC purity 99.34%, melting point 105-.
By using1H-NMR,13C-NMR, FT-IR detection, data as follows:1H-NMR:0.07-0.06(d,J=6.0,6H,N(CH3)2),0.86(s,9H,C(CH3)3),1.19(d,J=6.4,3H,CH3),2.04(s,3H,CH3),3.11(t,J=2.4,lH,CH),4.23-4.21(m,lH,OCH-),5.83(s,lH,OCH-N),7.04(s,lH,NH).13C-NMR:171.6,166.4,74.9,64.8,63.7,25.6,20.8,20.5,17.8,-4.4,-5.1.IR(KBr):v 3205,2963,2934,2893,2852,1772,1755,1463,1379,1359,1340,1250,1231,1165,1107,1074,1036,978,944,889,868cm-1
example 2
A new synthesis method of a penem drug intermediate (3R,4R) -3- (R) -1-tert-butyl dimethyl silica ethyl ] -4-acetoxyl-2-azetidinone (short for 4-AA) comprises the following steps:
(1) synthesis of intermediate A
5.9kg of (R) -3-hydroxybutyric acid methyl ester, 8L of DMF-DMA and 8kg of toluene were added to the reaction vessel, stirred, and reacted at 110 ℃ under reflux for 3 hours, after which the reaction vessel was cooled to room temperature. The obtained mixture was concentrated under reduced pressure at 70 ℃ to recover toluene, and the obtained concentrated solution was purified by silica gel column chromatography using methanol/petroleum ether (20:80) as a mobile phase to obtain intermediate a, which was 85% in reaction yield.
(2) Synthesis of intermediate B
Adding 3kg of the intermediate A into a reaction kettle, adding 5L of acetonitrile serving as a solvent, dropwise adding 2L of p-anisidine acetonitrile solution with the concentration of 0.5mol/L at room temperature, stirring and heating to 60 ℃ after dropwise adding is finished for 1 hour, keeping the temperature and reacting for 5 hours, heating to 80 ℃ after the reaction is finished, recovering acetonitrile, cooling a crude product to 0 ℃, performing suction filtration, leaching a filter cake with cold methanol, and drying to obtain white crystals with the yield of 86.2%.
(3) Synthesis of intermediate C
3kg of intermediate B, 7L of toluene and 100g of RoCl were added to the reactor2[(R)-BINAP]2·N(C2H5)3And the catalyst and hydrogen are subjected to asymmetric hydrogenation reaction at 50 ℃, and the pressure of the hydrogen is 3 MPa. The reaction was carried out for 5 hours, after which the temperature was lowered to 0 ℃ and the mixture was filtered and the resulting clear liquid was distilled under reduced pressure leaving a white solid as the desired intermediate C. The yield was 84% and the ee value was 95.5%.
(4) Synthesis of intermediate D
1.75kg of intermediate C and 5kg of Na are added into a reaction kettle2CO3And 5L of DMAC, stirring and heating to 100 ℃, and carrying out heat preservation reaction for 1 h. Hot filtration, cooling the filtrate to 5 ℃, adding hydrochloric acid to acidify to pH 5 to give a white solid, filtration, and drying of the filter cake to give a white solid as intermediate D in 90.7% yield.
(5) Synthesis of intermediate E
1kg of intermediate D was charged into the reaction vessel, and an equal mass of triphenylphosphine and 0.25kg of dithiopyridine were added, and 5L of acetonitrile was added to dissolve the mixture, and the mixture was heated to a temperature of 80 ℃ and reacted with stirring for 15 hours, and the result was monitored by TLC. After the reaction was completed, it was cooled to room temperature. The solvent was recovered by distillation under reduced pressure at 65 ℃ and the residual oil was purified by recrystallization to give intermediate E in 89% yield and 97% purity by HPLC.
(6) Synthesis of intermediate F
Sequentially adding 3L of DMF and 0.5kg of intermediate E into a reaction kettle, uniformly stirring, adding 0.50kg of triethylamine and 0.25kg of tert-butyldimethylsilyl chloride, heating to 30-35 ℃, and keeping the temperature for 12-16 h. The extent of reaction of the compounds was monitored by TLC during this period. After the reaction was complete, 3L of water was added with stirring, cooled to 5 ℃ and extracted three times with 500mL of chloroform, and the organic phases were combined. The organic phase is washed three times by 1L saturated saline solution, and is dried for 24 hours under reduced pressure to obtain a crude product. Recrystallization from methanol-water solution gave F as a gray solid in 85% yield.
(7) Synthesis of intermediate G
Adding 4L of methanol and 1.50kg of intermediate F into a reaction kettle, introducing ozone (the mass concentration of the ozone is 25-26 mg/L), starting to add 1.35kg of sodium thiosulfate and 8kg of water, controlling the temperature below 5 ℃, and then adding 0.45kg of thiourea (after 1 hour of addition is finished). After the reaction is finished, the material is pumped into a concentration kettle to begin vacuum distillation to recover methanol, after the distillation is finished, 10kg of water is added, and the mixture is cooled, crystallized and dried to obtain 0.95kg of intermediate G with the yield of 93.1%.
(8) Synthesis of 4-AA
Dissolving 0.78kg of the intermediate G obtained in the previous step in a mixed solvent composed of 2L of dichloromethane, 1L of acetic acid and 1L of acetonitrile, and adding 42G of RuCl3As a catalyst. Controlling the temperature at 0 ℃, continuously dropwise adding 2.5L of acetic acid solution of peroxyacetic acid with the concentration of 1mol/L under stirring, monitoring the reaction process by TLC, after the reaction is finished, distilling and concentrating the product under reduced pressure at 30 ℃, adding saturated salt water to wash for 3 times after the reaction is finished, distilling and concentrating under reduced pressure, recrystallizing to obtain white crystals, and passing through a silica gel column to obtain 0.87kg of 4-AA with the yield of 93.3%.
Example 3
A new synthesis method of a penem drug intermediate (3R,4R) -3- (R) -1-tert-butyl dimethyl silica ethyl ] -4-acetoxyl-2-azetidinone (short for 4-AA) comprises the following steps:
(1) synthesis of intermediate A
5.9kg of (R) -3-hydroxybutyric acid methyl ester, 8L of DMF-DMA and 15L of dichloromethane were added to the reaction vessel, stirred, and reacted at 90 ℃ under reflux for 4 hours, after which the reaction vessel was cooled to room temperature. 10L of distilled water was added and the mixture was washed 3 times. And (3) separating, namely decompressing the organic layer at 60 ℃ to recover dichloromethane, wherein the recovered dichloromethane can be recycled, and the obtained foam is the intermediate A which is not required to be treated and is directly used in the next step. The reaction yield in this step was 76%.
(2) Synthesis of intermediate B
Adding 2.78kg of the intermediate A into a reaction kettle, adding 7.5L of solvent methanol, dropwise adding 2L of p-anisidine methanol solution with the concentration of 0.5mol/L at room temperature, stirring and heating to 60 ℃, preserving the temperature and reacting for 6 hours after 1 hour of dropwise adding, and monitoring the reaction by TLC. After the reaction, the temperature was raised to 80 ℃ to recover methanol. And cooling the concentrated product to 0 ℃, performing suction filtration, leaching a filter cake with cold methanol, and drying to obtain white crystals with the yield of 80.2%.
(3) Synthesis of intermediate C
3kg of intermediate B, 7L of dichloromethane were added to the reaction kettle, and 100g of RoCl was added2[(R)-BINAP]2·N(C2H5)3And carrying out asymmetric chiral hydrogenation reduction reaction with hydrogen at 30 ℃, wherein the pressure of the hydrogen is 4 MPa. The reaction was carried out for 5 hours, after which the temperature was lowered to 0 ℃ and the mixture was filtered and the resulting clear liquid was distilled under reduced pressure leaving a white solid as the desired intermediate C. The yield was 80% and the ee value was 94.9%.
(4) Synthesis of intermediate D
1.75kg of intermediate C and 6kg of Na were added to the reaction kettle2CO3And 7.5L of pyridine, stirring and heating to 80 ℃, and keeping the temperature for reaction for 2 hours. Hot filtering, cooling the filtrate to 5 ℃, adding hydrochloric acid to acidify to pH 5 to obtain a white solid, filtering, and drying the filter cake to obtain a white solid which is intermediate D. The yield thereof was found to be 89.4%.
(5) Synthesis of intermediate E
1kg of intermediate D was added to the reaction vessel, an equimolar amount of triethylamine was added, 20L of MTHF was added, the mixture was dissolved, the mixture was heated to 80 ℃ and reacted with stirring for 15 hours, and the result was monitored by TLC. After the reaction was completed, it was cooled to room temperature. The solvent was recovered by distillation at 70 ℃ under reduced pressure and the residual oil was purified by recrystallization to give intermediate E in 83% yield and 97% purity by HPLC.
(6) Synthesis of intermediate F
Sequentially adding 3L of DMF and 0.5kg of intermediate E into a reaction kettle, uniformly stirring, adding 0.50kg of triethylamine and 0.25kg of tert-butyldimethylsilyl chloride, heating to 30-35 ℃, and keeping the temperature for 12-16 h. The extent of reaction of the compounds was monitored by TLC during this period. After the reaction was complete, 3L of water was added with stirring, cooled to 5 ℃ and extracted three times with 500mL of chloroform, and the organic phases were combined. The organic phase is washed three times by 1L saturated saline solution, and is dried for 24 hours under reduced pressure to obtain a crude product. Recrystallization from methanol-water solution gave F as a gray solid in 85% yield.
(7) Synthesis of intermediate G
7.50L of methanol and 0.50kg of intermediate F were added to the reactor, 1.25kg of ammonium ceric nitrate was added slowly at a temperature below 5 ℃ and after the addition, the mixture was heated to 80 ℃ for 8 hours and the reaction was monitored by TLC. After the reaction is finished, the material is pumped into a concentration kettle to begin vacuum distillation to recover methanol, after the distillation is finished, 10kg of water is added, and the mixture is cooled, crystallized and dried to obtain 0.288kg of intermediate G with the yield of 84.2%.
(8)4-AA synthesis:
0.78kg of the intermediate G obtained in the previous step was dissolved in a mixed solvent composed of 2L of dichloromethane, 1L of acetic acid and 1L of acetonitrile, and 42G of RuCl was added3As a catalyst. Controlling the temperature at 0 ℃, continuously dropwise adding 2.5L of acetic acid solution of peroxyacetic acid with the concentration of 1mol/L under stirring, monitoring the reaction process by TLC, after the reaction is finished, distilling and concentrating the product under reduced pressure at 30 ℃, adding saturated salt water to wash for 3 times after the reaction is finished, distilling and concentrating under reduced pressure, recrystallizing to obtain white crystals, and passing through a silica gel column to obtain 0.87kg of 4-AA with the yield of 93.3%.
Comparative example 1
The only difference from example 1 is that in step (1), the solvent used was acetonitrile, the reaction was refluxed at 80 ℃ for 3 hours, and after completion, the reaction vessel was cooled to room temperature. 4L of distilled water was added and the mixture was extracted 3 times with 2L of cyclohexane. Separating, recovering cyclohexane from the upper organic layer at 50 ℃ under reduced pressure, and directly using the residual solid foam as the intermediate A in the next step without treatment. The reaction yield in this step was 50%.
Comparative example 2
The only difference from example 1 is that in step (3), the chiral catalyst used is RuBr2[(R)-BINAP]The other conditions are the same, the reaction yield of the step is75% and ee value 95.1%.
Comparative example 3
The only difference from example 1 is that in step (3), the chiral catalyst used is [ RuCl (C)6H6)((R)-BINAP)]Cl, the remaining conditions were the same, giving a reaction yield of 74.3% for this step and an ee of 96.1%.
Comparative example 4
The difference from example 1 is only that in step (4), the base used is sodium ethoxide, and the other conditions are the same, so that the reaction yield of this step is 77.3%.
Comparative example 5
The only difference from example 1 is that in step (4), the base used is sodium hydroxide, and the other conditions are the same, so that the reaction yield of this step is 85.4%.

Claims (7)

1. A synthetic method of a penem drug intermediate is characterized by comprising the following steps:
(1) taking (R) -3-hydroxybutyric acid ester as a raw material, and reacting with N, N-dimethylformamide dimethyl acetal to obtain an intermediate A shown in a formula (I);
Figure FDA0002306741840000011
(2) carrying out substitution reaction on the intermediate A and p-anisidine to obtain an intermediate B shown as a formula (II);
Figure FDA0002306741840000012
(3) under the action of a ruthenium catalyst, carrying out chiral hydrogenation reduction reaction on the intermediate B and hydrogen to obtain an intermediate C shown in a formula (III);
Figure FDA0002306741840000021
(4) hydrolyzing the intermediate D shown in the formula (IV) by the intermediate C;
Figure FDA0002306741840000022
(5) under the condition of an alkaline reagent, the intermediate D is subjected to a ring closing reaction to obtain an intermediate E shown in a formula (V), wherein the alkaline reagent is a mixture of triphenylphosphine and 2, 2' -dithiodipyridine or triethylamine;
Figure FDA0002306741840000023
(6) under the action of an acid-binding agent, reacting the intermediate E with tert-butyldimethylsilyl chloride to obtain an intermediate F shown in a formula (VI), wherein the acid-binding agent is triethylamine, imidazole or 4-N, N-dimethylaminopyridine;
Figure FDA0002306741840000031
(7) removing a protecting group on nitrogen from the intermediate F under the action of an oxidant to obtain an intermediate G shown in a formula (VII), wherein the oxidant is ozone or ammonium ceric nitrate;
Figure FDA0002306741840000032
(8) under the catalysis of ruthenium trichloride, reacting the intermediate G with peroxyacetic acid to obtain 4-AA shown in a formula (VIII);
Figure FDA0002306741840000033
wherein R is methyl or ethyl.
2. The method for synthesizing penem pharmaceutical intermediates of claim 1, wherein in step (1), the reaction solvent is one of methyl tetrahydrofuran, toluene, benzene, dichloromethane and acetonitrile, or a mixture thereof in any proportion.
3. The method for synthesizing the penem pharmaceutical intermediate according to claim 1, wherein in step (3), the catalyst, the intermediate B and the reaction solvent are mixed, 1-6 MPa of hydrogen is charged into each mol of the intermediate B, and the manual hydrogenation reduction reaction is carried out at 30-100 ℃ for 3-10 h to obtain the intermediate C.
4. The method for synthesizing penem intermediates of claim 3, wherein the catalyst is RuBr2[(R)-BINAP],RuCl2[(R)-BINAP]2·N(C2H5)3Or [ RuCl (C)6H6)((R)-BINAP)]Cl。
5. The method for synthesizing penem intermediates of claim 4, wherein the catalyst is RuCl2[(R)-BINAP]2·N(C2H5)3
6. The method for synthesizing the penem pharmaceutical intermediate as claimed in claim 1, wherein in step (4), the intermediate C, alkali and reaction solvent are subjected to hydrolysis reaction at 30-100 ℃, and after reaction for 1-3 h, the intermediate C is acidified, filtered and dried to obtain the intermediate D.
7. The method for synthesizing penem pharmaceutical intermediate according to claim 6, wherein the base is sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide or sodium ethoxide.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008007836A1 (en) * 2006-07-13 2008-01-17 Choongwae Pharma Corporation Method for preparing 4-acetoxyazetidinone and derivatives thereof
CN102002066A (en) * 2010-11-01 2011-04-06 山东鑫泉医药中间体有限公司 Synthesis method of 4-acetoxyl-2-azetidinone
CN103665021A (en) * 2013-12-03 2014-03-26 西安赛美科医药研发有限公司 Synthetic method of biapenem drug intermediate 4-AA

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008007836A1 (en) * 2006-07-13 2008-01-17 Choongwae Pharma Corporation Method for preparing 4-acetoxyazetidinone and derivatives thereof
CN102002066A (en) * 2010-11-01 2011-04-06 山东鑫泉医药中间体有限公司 Synthesis method of 4-acetoxyl-2-azetidinone
CN103665021A (en) * 2013-12-03 2014-03-26 西安赛美科医药研发有限公司 Synthetic method of biapenem drug intermediate 4-AA

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