CN111266133B - Manganese metal catalyst and synthetic method thereof, and synthetic method of vegetable oil-based amide compound - Google Patents

Manganese metal catalyst and synthetic method thereof, and synthetic method of vegetable oil-based amide compound Download PDF

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CN111266133B
CN111266133B CN202010169799.2A CN202010169799A CN111266133B CN 111266133 B CN111266133 B CN 111266133B CN 202010169799 A CN202010169799 A CN 202010169799A CN 111266133 B CN111266133 B CN 111266133B
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刘宁
付正强
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Shihezi University
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    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
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    • C07D303/38Compounds containing oxirane rings with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D303/40Compounds containing oxirane rings with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals by ester radicals
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Abstract

The invention provides a manganese metal catalyst and a synthesis method thereof, and a synthesis method of a vegetable oil-based amide compound, belonging to the technical field of organic synthesis. The invention firstly synthesizes a manganese metal catalyst, and the vegetable oil-based amide compound can be obtained by only one-step reaction by using the catalyst. The manganese metal catalyst provided by the invention takes the easily prepared nitrogen heterocyclic ring bridged benzimidazole salt as a raw material, has a simple synthesis method and high yield, and has a good catalytic effect when being used for preparing the vegetable oil-based amide compound. The synthetic method of the vegetable oil-based amide compound provided by the invention is simple, the cost is low, the vegetable oil-based amide compound can be obtained by only one-step reaction, and toxic byproducts are not generated. The results of the examples show that the yield of the vegetable oil-based amide compound obtained by the method can reach more than 70%.

Description

Manganese metal catalyst and synthetic method thereof, and synthetic method of vegetable oil-based amide compound
Technical Field
The invention relates to the technical field of organic synthesis, and particularly relates to a manganese metal catalyst and a synthesis method thereof, and a synthesis method of a vegetable oil-based amide compound.
Background
The vegetable oil-based amide compounds are important medicine molecules with antiviral and antidepressant effects. At present, the vegetable oil-based amide compound medicines comprise the following medicines:
Figure BDA0002408782840000011
the traditional synthetic method of the medicine is mainly obtained by reacting carboxylic acid compounds with acyl chloride and then reacting with amine compounds under the action of equivalent coupling reagents, and the method has the problems of multiple steps, non-conformity with atom economy and the like; in addition, expensive coupling reagents or high-temperature conditions are required in the reaction process, and the reaction cost is high.
Disclosure of Invention
In view of this, the present invention aims to provide a manganese metal catalyst and a synthesis method thereof, and a synthesis method of a vegetable oil-based amide compound. The manganese metal catalyst provided by the invention can be used for preparing the vegetable oil-based amide compound in a one-step catalytic manner.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a manganese metal catalyst, which has a chemical structural formula shown as formula 1a, formula 1b, formula 1c or formula 1 d:
Figure BDA0002408782840000021
the invention provides a synthesis method of a manganese metal catalyst, which comprises the following steps:
mixing nitrogen heterocyclic bridged benzimidazole salt, manganese pentacarbonyl bromide, potassium tert-butoxide and a polar organic solvent, and carrying out metal oxidation addition reaction to obtain a manganese metal catalyst;
the nitrogen heterocyclic ring bridged benzimidazole salt has a structure shown in a formula 2:
Figure BDA0002408782840000022
in the formula 2, X is I or Br;
when X is I, R is one of Me, n-Pr and n-Bu;
when X is Br, R is n-Pr.
Preferably, the mole ratio of the nitrogen heterocyclic bridged benzimidazole salt to the manganese pentacarbonyl bromide to the potassium tert-butoxide is 1: 0.5-0.8: 0.4 to 0.6.
Preferably, the temperature of the metal oxidation addition reaction is 50-80 ℃, and the time is 18-20 h.
Preferably, after the metal oxidation addition, the method further comprises performing post-treatment on the metal oxidation addition liquid, wherein the post-treatment comprises the following steps:
and cooling, distilling, recrystallizing, filtering and drying the metal oxidation addition reaction liquid in sequence to obtain the manganese metal catalyst solid.
The invention provides a synthetic method of a vegetable oil-based amide compound, which comprises the following steps:
mixing vegetable oil ester compounds, amine compounds, sodium tert-butoxide, manganese metal catalysts and organic solvents, and carrying out oxidation addition reaction to obtain vegetable oil-based amide compounds;
the vegetable oil ester compound is one of methyl oleate, ethyl oleate, methyl linoleate, methyl erucate, methyl ricinoleate, methyl 10-undecylenate and epoxidized derivatives of vegetable oleate;
the amine compound has a structure shown in formula 3:
Figure BDA0002408782840000031
in formula 3, R 1 And R 2 Independently one of hydrogen, alkyl and aryl;
the manganese metal catalyst is the manganese metal catalyst.
Preferably, the molar ratio of the vegetable oil ester compound to the amine compound to the sodium tert-butoxide to the manganese metal catalyst is 1: 1.2-2: 0.2 to 0.5:0.01 to 0.05.
Preferably, the alkyl group is a primary or secondary alkyl group; the aryl group is a primary or secondary aryl group.
Preferably, the temperature of the oxidation addition reaction is 60-90 ℃ and the time is 18-24 h.
Preferably, the post-treatment of the oxidation addition reaction liquid after the oxidation addition reaction comprises the following steps:
and sequentially carrying out extraction, organic phase evaporation and thin-layer chromatographic column separation on the oxidation addition reaction liquid to obtain a pure vegetable oil-based amide compound.
The invention provides a manganese metal catalyst which has a good catalytic effect when used for preparing a vegetable oil-based amide compound. In the invention, the valence of manganese metal in the manganese metal catalyst is positive and monovalent, the positive and monovalent manganese is reduced into zero-valent manganese under the alkaline condition, the zero-valent manganese can be inserted into an ester group of a vegetable oil ester compound to generate an intermediate product, and then the intermediate product reacts with an amine compound to generate a target product, and manganese is removed, thereby completing the catalytic process.
The invention provides a method for synthesizing a manganese metal catalyst, which takes easily prepared nitrogen heterocyclic ring bridged benzimidazole salt as a raw material, and has simple synthesis method and high yield. The results of the examples show that the yield of the manganese metal catalyst of the synthesis method provided by the invention is 70-80%.
The invention provides a method for synthesizing a vegetable oil-based amide compound, which uses vegetable oil ester to perform oxidation addition reaction with amines under the action of manganese catalysis to obtain a product, has simple synthetic route and low cost, can obtain the vegetable oil-based amide compound by only one-step reaction, and does not generate toxic by-products. The results of the examples show that the yield of the vegetable oil-based amide compounds obtained by the method can reach more than 70%.
Drawings
FIG. 1 is a hydrogen spectrum of a manganese metal catalyst 1a obtained in example 1;
FIG. 2 is a hydrogen spectrum of the manganese metal catalyst 1b obtained in example 2;
FIG. 3 is a hydrogen spectrum of the manganese metal catalyst 1c obtained in example 3;
FIG. 4 is a hydrogen spectrum of the manganese metal catalyst 1d obtained in example 4;
FIG. 5 is a chart of a hydrogen spectrum of N-phenethyl oleamide obtained in example 5;
FIG. 6 is a carbon spectrum of N-phenethyloleamide obtained in example 5;
FIG. 7 is a hydrogen spectrum of 8- (3-octyloxa-2-yl) -N-phenethyloctanamide obtained in example 6;
FIG. 8 is a carbon spectrum of 8- (3-octyloxa-2-yl) -N-phenethyloctanamide obtained in example 6;
FIG. 9 is a hydrogen spectrum of N-phenethylundeceneamide obtained in example 7;
FIG. 10 is a carbon spectrum of N-phenethylundeceneamide obtained in example 7;
FIG. 11 is a hydrogen spectrum of 8- (3-octyloxa-2-yl) -N-phenyloctanoyl amide obtained in example 8;
FIG. 12 is a carbon spectrum of 8- (3-octyloxa-2-yl) -N-phenyloctanamide obtained in example 8.
Detailed Description
The invention provides a manganese metal catalyst, which has a chemical structural formula shown as formula 1a, formula 1b, formula 1c or formula 1 d:
Figure BDA0002408782840000041
in the invention, me is methyl, n-Pr is n-propyl, and n-Bu is n-butyl.
In the invention, the manganese metal catalyst is firstly reduced into zero-valent manganese by the action of alkali in a reaction cycle, then the zero-valent manganese is inserted into methyl ester to form an intermediate product, and then the intermediate product reacts with amine, manganese is removed to generate a product, and the reaction is finished. The manganese metal catalyst provided by the invention can be used for preparing known medicines, such as amide medicines, such as Moclobiemide, tigan, flecainide and the like, by catalysis.
The invention provides a preparation method of the manganese metal catalyst, which comprises the following steps:
mixing nitrogen heterocyclic bridged benzimidazole salt, manganese pentacarbonyl bromide, potassium tert-butoxide and a polar organic solvent, and carrying out metal oxidation addition reaction to obtain a manganese metal catalyst;
in the invention, the nitrogen heterocyclic ring bridged benzimidazole salt has a structure shown in a formula 2:
Figure BDA0002408782840000051
in the formula 2, X is I or Br;
when X is I, R is one of Me, n-Pr and n-Bu;
when X is Br, R is n-Pr.
In the present invention, the mole ratio of the nitrogen heterocyclic bridged benzimidazole salt, the manganese pentacarbonyl bromide and the sodium tert-butoxide is preferably 1:0.5 to 0.8:0.4 to 0.6, more preferably 1:0.6:0.5. in the present invention, the solvent is preferably a polar organic solvent, and the polar organic solvent is preferably one of tetrahydrofuran, acetonitrile and methanol, and more preferably tetrahydrofuran. In the present invention, the amount ratio of the nitrogen heterocyclic bridged benzimidazole salt to the solvent is preferably 1mmol: 1-2 mL. In the invention, the potassium tert-butoxide plays a role in removing active hydrogen on the nitrogen heterocyclic ring bridged benzimidazole salt and playing a role in oxidation. In the invention, the nitrogen heterocyclic bridged benzimidazole salt is easy to prepare and has wide sources. In the invention, the preparation method of the nitrogen heterocyclic bridged benzimidazole salt comprises the following steps:
firstly, carrying out substitution reaction on 2, 6-dibromopyridine and benzimidazole under the conditions of DMSO and CuI to obtain a substitution reaction product;
the temperature of the substitution reaction is 110 ℃, and the time is 12h;
reacting the substituted alkyl halide in acetonitrile solution to obtain nitrogen heterocyclic ring bridged benzimidazole salt;
the alkyl halide is one of methyl iodide, iodopropane, iodobutane and bromopropane;
the reaction temperature is 80 ℃ and the reaction time is 6h.
When X of the nitrogen heterocyclic bridged benzimidazole salt is I and R is Me, the reaction formula for preparing the nitrogen heterocyclic bridged benzimidazole salt is shown as the formula I:
Figure BDA0002408782840000061
the invention does not require any particular mixing means, such as stirring, known to the person skilled in the art. In the present invention, the reaction temperature of the metal oxidation addition reaction is preferably 50 to 80 ℃, more preferably 60 to 70 ℃; the reaction time is preferably 18 to 20 hours, more preferably 19 hours. In the present invention, the time for raising the temperature to the reaction temperature is preferably 3min. The metal oxidation addition reaction is preferably carried out under the condition of stirring, and the stirring speed is preferably 500r/min.
In the invention, the reaction formula of the metal oxidation addition reaction is shown as formula II:
Figure BDA0002408782840000062
in the present invention, it is preferable that the metal oxide addition liquid is subjected to a post-treatment after the metal oxide addition, and the post-treatment preferably comprises the steps of:
and cooling, distilling, recrystallizing, filtering and drying the metal oxidation addition reaction liquid in sequence to obtain the manganese metal catalyst solid.
The present invention does not require any particular cooling means, as those known to those skilled in the art, such as natural cooling to room temperature. In the present invention, the distillation mode is preferably reduced pressure rotary distillation, and the solid mixture containing the catalyst and the reactant is obtained by recrystallization. The recrystallization is preferably carried out by adding acetonitrile, and in the present invention, the recrystallized solid mixture is distilled, and the residual reactant is removed by recrystallization. The present invention does not require any particular means of filtration, and filtration methods well known to those skilled in the art may be used. In the present invention, the drying temperature is preferably room temperature, and the time is preferably 2 hours.
The invention provides a synthetic method of a vegetable oil-based amide compound, which comprises the following steps:
mixing vegetable oil ester compounds, amine compounds, sodium tert-butoxide, manganese metal catalysts and solvents, and carrying out oxidation addition reaction to obtain vegetable oil-based amide compounds;
the vegetable oil ester compound has a structure shown in a formula 4:
Figure BDA0002408782840000071
the vegetable oil ester compound is one of methyl oleate, ethyl oleate, methyl linoleate, methyl erucate, methyl ricinoleate, 10-methyl undecylenate and epoxidized derivatives of vegetable oleate. The amine compound has a structure shown in formula 3:
Figure BDA0002408782840000072
in the formula 3, R 1 And R 2 Independently one of hydrogen, alkyl and aryl; in the present invention, the alkyl group is preferably a primary or secondary alkyl group, and the aryl group is preferably a primary or secondary aryl group, and in the present invention, the amine compound is preferably one of pentylamine, dibutylamine, aniline, and diphenylamine.
The manganese metal catalyst is the manganese metal catalyst provided by the invention.
The vegetable oil-based amide compound is prepared by mixing vegetable oil ester compounds, amine compounds, sodium tert-butoxide, manganese metal catalysts and organic solvents, and performing oxidation addition reaction. In the present invention, the molar ratio of the vegetable oil ester compound, the amine compound, sodium tert-butoxide and the manganese metal catalyst is preferably 1: 1.2-2: 0.2 to 0.5:0.01 to 0.05, more preferably 1: 1.5-1.8: 0.2:0.01.
in the present invention, the organic solvent is preferably one or more of toluene, 1, 4-dioxane, methanol, ethanol, N-dimethylformamide, N-dimethylacetamide, acetonitrile, ethyl acetate, dichloromethane, tetrahydrofuran, a nitrogen heterocyclic compound, chloroform and acetone. In the present invention, the solvent is preferably an untreated solvent. In the present invention, the molar ratio of the vegetable oil ester compound to the organic solvent is preferably 1:15.
in the invention, sodium tert-butoxide is used for generating sodium iodide or sodium bromide from iodide or bromide of the catalyst and leaving the sodium iodide or sodium bromide to ensure that the catalyst is in positive valence and attracts electrons.
The invention does not require any particular mixing means, as is known to those skilled in the art, such as stirring.
In the present invention, the reaction temperature of the oxidative addition reaction is preferably 60 to 90 ℃, more preferably 70 to 80 ℃; the reaction time is preferably 18 to 24 hours, more preferably 20 to 22 hours. In the present invention, the time for raising the temperature to the reaction temperature is preferably 5 minutes. The oxidative addition reaction is preferably carried out under stirring, preferably at a rate of 500r/min.
In the invention, the valence of manganese metal in the manganese metal catalyst is monovalent, sodium tert-butoxide provides alkaline conditions for reaction, monovalent manganese is reduced to zero-valent manganese under the action of alkali, and the zero-valent manganese is inserted into an ester group of a vegetable oil ester compound to generate an intermediate product
Figure BDA0002408782840000081
Then reacting with amine compound to generate target product, and removing manganese to complete the catalysis process. In the present invention, the chemical reaction formula of the oxidative addition is shown as formula III:
Figure BDA0002408782840000082
in the present invention, it is preferable that the oxidative addition reaction liquid is subjected to a post-treatment after the oxidative addition reaction, the post-treatment comprising the steps of:
and sequentially carrying out extraction, organic phase evaporation and thin-layer chromatographic column separation on the oxidation addition reaction liquid to obtain a pure vegetable oil-based amide compound.
In the present invention, the oxidative addition reaction solution is preferably extracted with dichloromethane and a saturated common salt solution, and the number of times of extraction is preferably 3. In the present invention, the volume ratio of the dichloromethane to the saturated saline solution is preferably 1: in the present invention, the saturated saline solution has the effects of preventing emulsification and reducing the solubility of organic compounds in water. After extraction, the organic phase obtained is evaporated according to the invention. The present invention does not require any particular means for said evaporation, and can be carried out using methods known to the person skilled in the art, such as rotary evaporation. The present invention removes the dichloromethane phase by the evaporation. In the present invention, the mobile phase separated by the thin layer chromatography column is preferably petroleum ether: ethyl acetate =5:1.
the invention uses vegetable oil ester to react with amine compounds under the action of manganese catalysis to obtain products, and has the advantages of mild conditions, no need of solvent treatment, simple steps and high atom economy. The vegetable oil-based amide compounds obtained by the synthesis method of the invention preferably include the following compounds shown in table 1:
TABLE 1 vegetable oil-based amides obtained by the Synthesis method of the invention
Figure BDA0002408782840000091
The manganese metal catalyst and the synthesis method thereof and the synthesis method of the vegetable oil-based amide compound provided by the present invention are described in detail below with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Adding 2mL of tetrahydrofuran solution into a reaction tube, adding 1mmol of nitrogen heterocyclic bridged benzimidazole salt (R = Me at the moment, X = I), then adding 0.8mmol of manganese pentacarbonyl bromide, adding 0.6mmol of potassium tert-butoxide, heating to 50 ℃, stirring for 18h (stirring speed is 500R/min), cooling to room temperature after the reaction is completed, carrying out reduced pressure rotary distillation on the product, adding acetonitrile for recrystallization, filtering, and drying at room temperature for 2 hours to obtain the manganese metal catalyst 1a with the mass of 289mg and the yield of 76%.
The hydrogen spectrum of the obtained product is shown in figure 1, and the hydrogen spectrum data is as follows:
1 H NMR(DMSO,400MHz):δ9.07(brs,1H),8.49(d,J=36.8Hz,2H),8.25(brs,1H),7.94(brs,1H),7.57(brs,3H),4.29(s,3H).HRMS(ESI)calcd for C 16 H 11 IMnN 3 O 3 [M-I] + 348.0175,found 348.0179。
example 2
Adding 2mL of tetrahydrofuran solution into a reaction tube, adding 1mmol of nitrogen heterocyclic bridged benzimidazole salt (R = n-Pr at the moment, and X = I), then adding 0.8mmol of manganese pentacarbonyl bromide, adding 0.6mmol of potassium tert-butoxide, heating to 60 ℃, stirring for 20h (stirring speed 500R/min), cooling to room temperature after the reaction is completed, carrying out reduced pressure rotary distillation on the product, adding acetonitrile for recrystallization, filtering, and drying at room temperature for 2h to obtain the manganese metal catalyst 1b with the mass of 294mg and the yield of 73%.
The hydrogen spectrum of the obtained product is shown in figure 2, and the hydrogen spectrum data are as follows:
1 H NMR(DMSO,400MHz):δ9.07(brs,1H),8.49(d,J=34.8Hz,2H),8.25(brs,1H),8.01(brs,1H),7.56(brs,3H),4.70(s,2H),2.07(brs,2H),1.06(s,3H).HRMS(ESI)calcd for C 18 H 15 IMnN 3 O 3 [M-I] + 376.0488,found 376.0496。
example 3
Adding 2mL of tetrahydrofuran solution into a reaction tube, adding 1mmol of nitrogen heterocyclic ring bridged benzimidazole salt (R = n-Bu and X = I), then adding 0.8mmol of manganese pentacarbonyl bromide and 0.6mmol of potassium tert-butoxide, heating to 70 ℃, stirring for 22h (stirring speed 500R/min), cooling to room temperature after the reaction is completed, carrying out reduced pressure rotary distillation on the product, adding acetonitrile for recrystallization, filtering, and drying at room temperature for 2h to obtain the manganese metal catalyst 1c with the mass of 281mg and the yield of 68%.
The hydrogen spectrum of the obtained product is shown in figure 3, and the hydrogen spectrum data is as follows:
1 H NMR(DMSO,400MHz):δ9.07(brs,1H),8.49(d,J=35.2Hz,2H),8.24(brs,1H),7.98(brs,1H),7.57(brs,3H),4.73(s,2H),2.07(brs,2H),1.50(brs,2H),1.06(s,3H).HRMS(ESI)calcd for C 19 H 17 IMnN 3 O 3 [M-I] + 390.0645,found 390.0656。
example 4
2ml of tetrahydrofuran solution was added to the reaction tube, and 1mmol of the azacyclo-bridged benzimidazole salt (in this case R = n-Pr, X = PF) was added 6 ) Then adding 0.8mmol of manganese pentacarbonyl bromide and 0.6mmol of potassium tert-butoxide, heating to 80 ℃, stirring for 24h (stirring speed 500 r/min), cooling to room temperature after the reaction is finished, carrying out reduced pressure rotary distillation on the product, adding acetonitrile, recrystallizing, filtering, and drying at room temperature for 2h to obtain the manganese metal catalyst 1d with the mass of 295mg and the yield of 81%.
The hydrogen spectrum of the obtained product is shown in figure 4, and the hydrogen spectrum data is as follows:
1 H NMR(DMSO,400MHz):δ8.46-7.62(m,8H),4.77(brs,2H),2.08(brs,2H),1.24-1.09(m,3H).HRMS(ESI)calcd for C 18 H 15 BrMnN 3 O 3 [M-Br] + 376.0488,found 376.0502。
example 5
Stirring 1mmol of methyl oleate, 1.2mmol of phenethylamine, 0.2mmol of sodium tert-butoxide, 0.01mmol of manganese metal catalyst 1a and 2mL of untreated toluene solvent at the temperature of 90 ℃ for 18h, extracting the required product for 3 times by dichloromethane and saturated saline after the reaction is finished, putting the required product in a dichloromethane phase, carrying out rotary evaporation on the dichloromethane phase, removing the dichloromethane phase, and carrying out thin-layer chromatography column separation on the residue to obtain the N-phenethyl oleamide, wherein the structural formula is shown in the specification
Figure BDA0002408782840000111
The yield reaches 70 percent.
The hydrogen spectrum of the obtained product is shown in figure 5, and the hydrogen spectrum data is as follows:
1 H NMR(CDCl 3 ,400MHz):δ7.19(t,J=7.2Hz,2H),7.13-7.08(m,3H),5.95(brs,1H),5.27-5.24(m,2H),3.39(q,J=7.2Hz,2H),2.71(t,J=7.2Hz,2H),2.03(t,J=7.2Hz,2H),1.95-1.90(m,3H),2.03(t,J=6.8Hz,2H),1.21-1.18(m,21H),0.81-0.78(m,3H).
the carbon spectrum of the obtained product is shown in FIG. 6, and the carbon spectrum data are as follows:
13 C NMR(CDCl 3 ,100MHz):δ173.38,139.02,129.97,129.72,128.72,128.55,126.42,40.65,36.70,35.75,31.93,29.79,29.76,29.69,29.56,29.40,29.35,29.31,29.19,27.25,27.21,25.84,22.71,14.14.
example 6
1mmol of epoxidized methyl oleate
Figure BDA0002408782840000121
Mixing with 1.2mmol phenethylamine, 0.2mmol sodium tert-butoxide, 0.01mmol manganese metal catalyst 1b and 2mL untreated toluene solvent, stirring at 60 deg.C for 18h, extracting the desired product with dichloromethane and saturated saline water for 3 times, subjecting the desired product to rotary evaporation in dichloromethane phase, removing dichloromethane phase, separating the residue with thin layer chromatography to obtain 8- (3-octyloxa-2-yl) -N-phenethyl octanoamide with structural formula of
Figure BDA0002408782840000122
The yield reaches 75 percent.
The hydrogen spectrum of the obtained product is shown in figure 7, and the hydrogen spectrum data are as follows:
1 H NMR(CDCl 3 ,400MHz):δ7.29(t,J=6.8Hz,2H),7.23-7.17(m,3H),5.57(brs,1H),3.50(q,J=7.2Hz,2H),2.90-2.87(m,2H),2.80(t,J=6.8Hz,2H),2.10(t,J=7.6Hz,2H),1.60-1.26(m,26H),0.88-0.85(m,3H).
the carbon spectrum of the obtained product is shown in figure 8, and the carbon spectrum data are as follows:
13 C NMR(CDCl 3 ,100MHz):δ173.08,138.98,128.76,128.61,126.48,57.24,57.21,40.51,36.75,35.74,31.86,29.56,29.54,29.34,29.25,29.23,29.14,27.84,27.79,26.61,26.60,25.68,22.67,14.11.
example 7
1mmol of methyl 10-undecenoate, 1.2mmol of phenethylamine, 0.6mmol of sodium tert-butoxide, 0.01mmol of manganese metal catalyst 1c,2mL of untreated catalystStirring the toluene solvent at the temperature of 70 ℃ for 18 hours, extracting the required product for 3 times by dichloromethane and saturated saline after the reaction is finished, putting the required product in a dichloromethane phase, carrying out rotary evaporation on the dichloromethane phase, removing the dichloromethane phase, and carrying out thin-layer chromatography column separation on the residue to obtain the N-phenethyl undeceneamide with the structural formula of
Figure BDA0002408782840000123
The yield reaches 79 percent.
The hydrogen spectrum of the obtained product is shown in figure 9, and the hydrogen spectrum data are as follows:
1 H NMR(CDCl 3 ,400MHz):δ7.29(t,J=6.8Hz,2H),7.23-7.17(m,3H),5.82-5.74(m,2H),4.94(qq,J=12.0,1.6Hz,2H),3.49(q,J=6.0Hz,2H),2.80(t,J=7.2Hz,2H),2.11(t,J=7.2Hz,2H),2.05-2.00(m,2H),1.59-1.56(m,2H),1.38-1.26(m,10H).
the carbon spectrum of the obtained product is shown in FIG. 10, and the carbon spectrum data is as follows:
13 C NMR(CDCl 3 ,100MHz):δ173.26,139.14,139.01,128.75,128.59,126.46,114.19,40.58,36.77,35.75,33.80,29.34,29.29,29.09,28.91,25.79,24.74.
example 8
1mmol of epoxidized methyl oleate, 1.2mmol of aniline, 0.6mmol of sodium tert-butoxide, 0.01mmol of manganese metal catalyst 1d, and 2mL of untreated toluene solvent are stirred at 80 ℃ for 20h, after the reaction is finished, the required product is extracted for 3 times by dichloromethane and saturated saline water, the required product is in a dichloromethane phase, the dichloromethane phase is subjected to rotary evaporation, the dichloromethane phase is removed, and the residue is subjected to thin-layer chromatography column separation to obtain 8- (3-octyloxa-2-yl) -N-phenyloctanamide, wherein the structural formula is shown in the specification
Figure BDA0002408782840000131
The yield reaches 70 percent.
The hydrogen spectrum of the obtained product is shown in figure 11, and the hydrogen spectrum data are as follows:
1 H NMR(CDCl 3 ,400MHz):δ7.50(d,J=7.6Hz,2H),7.40(brs,1H),7.30(t,J=7.6Hz,2H),7.08(t,J=7.6Hz,1H),2.93-2.88(m,2H),2.34(t,J=7.2Hz,2H),1.72-1.70(m,2H),1.50-1.24(m,24H),0.89-0.86(m,3H).
the carbon spectrum of the obtained product is shown in FIG. 12, and the carbon spectrum data are as follows:
13 C NMR(CDCl 3 ,100MHz):δ171.46,138.06,128.97,124.12,119.77,57.29,37.73,31.87,31.50,29.56,29.54,29.28,29.23,29.20,29.10,27.86,27.76,26.62,26.61,25.55,22.68,14.12.HRMS(ESI)calcd for C 24 H 39 NO 2 [M+H] + 374.3054,found 374.3058.
example 9
Stirring 1mmol of methyl oleate, 1.2mmol of naphthylamine, 0.6mmol of sodium tert-butoxide, 0.01mmol of manganese metal catalyst 1b and 2mL of untreated toluene solvent at the temperature of 90 ℃ for 22h, extracting the required product for 3 times by using dichloromethane and saturated saline after the reaction is finished, putting the required product in a dichloromethane phase, performing rotary evaporation on the dichloromethane phase, removing the dichloromethane phase, and performing thin-layer chromatography column separation on the residue to obtain N- (naphthalene-1-yl) oleamide, wherein the structural formula is shown in the specification
Figure BDA0002408782840000141
The yield reaches 74 percent.
Example 10
Stirring 1mmol methyl oleate, 1.2mmol p-methylaniline, 0.6mmol sodium tert-butoxide, 0.01mmol manganese metal catalyst 1d,2mL untreated toluene solvent at 90 ℃ for 24h, extracting the required product for 3 times by dichloromethane and saturated saline after the reaction is finished, putting the required product in a dichloromethane phase, carrying out rotary evaporation on the dichloromethane phase, removing the dichloromethane phase, carrying out thin-layer chromatography column separation on the residue to obtain N- (p-tolyl) oleamide, wherein the structural formula is shown in the specification
Figure BDA0002408782840000142
The yield reaches 74 percent.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A synthetic method of a vegetable oil-based amide compound is characterized by comprising the following steps:
mixing vegetable oil ester compounds, amine compounds, sodium tert-butoxide, manganese metal catalysts and organic solvents, and carrying out oxidation addition reaction to obtain vegetable oil-based amide compounds;
the vegetable oil ester compound is one of methyl oleate, ethyl oleate, methyl linoleate, methyl erucate, methyl ricinoleate, 10-methyl undecylenate and epoxidized derivatives of vegetable oleate;
the amine compound has a structure shown in formula 3:
Figure FDA0003799579870000011
in formula 3, R 1 And R 2 Independently one of hydrogen, alkyl and aryl;
the chemical structural formula of the manganese metal catalyst is shown as formula 1a, formula 1b, formula 1c or formula 1 d:
Figure FDA0003799579870000012
2. the synthesis method according to claim 1, characterized in that the synthesis method of the manganese metal catalyst comprises the following steps:
mixing nitrogen heterocyclic bridged benzimidazole salt, manganese pentacarbonyl bromide, potassium tert-butoxide and a polar organic solvent, and carrying out metal oxidation addition reaction to obtain a manganese metal catalyst;
the nitrogen heterocyclic bridged benzimidazole salt has a structure shown in a formula 2:
Figure FDA0003799579870000021
in the formula 2, X is I or Br;
when X is I, R is one of Me, n-Pr and n-Bu;
when X is Br, R is n-Pr.
3. The synthesis method according to claim 2, wherein the molar ratio of the nitrogen heterocyclic bridged benzimidazole salt to the manganese pentacarbonyl bromide to the potassium tert-butoxide is 1: 0.5-0.8: 0.4 to 0.6.
4. The synthesis method according to claim 2, characterized in that the temperature of the metal oxidative addition reaction is 50-80 ℃ and the time is 18-20 h.
5. The synthesis method according to claim 2 or 4, further comprising, after the metal oxidation addition, performing a post-treatment on the metal oxidation addition solution, wherein the post-treatment comprises the following steps:
and (3) sequentially cooling, distilling, recrystallizing, filtering and drying the metal oxidation addition reaction liquid to obtain the manganese metal catalyst solid.
6. The synthesis method according to claim 1, wherein the molar ratio of the vegetable oil ester compound to the amine compound to the sodium tert-butoxide to the manganese metal catalyst is 1: 1.2-2: 0.2 to 0.5:0.01 to 0.05.
7. The method of synthesis of claim 1, wherein the alkyl group is a primary or secondary alkyl group; the aryl group is a primary aryl group or a secondary aryl group.
8. The synthesis method according to claim 1, wherein the temperature of the oxidative addition reaction is 60-90 ℃ and the time is 18-24 h.
9. The synthesis method according to claim 1, further comprising post-treating the oxidative addition reaction solution after the oxidative addition reaction, wherein the post-treating comprises the steps of:
and sequentially carrying out extraction, organic phase evaporation and thin-layer chromatographic column separation on the oxidation addition reaction liquid to obtain a pure vegetable oil-based amide compound.
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