WO2020073181A1 - 邻甲氧基苯胺基锂在催化亚胺和硼烷硼氢化反应中的应用 - Google Patents
邻甲氧基苯胺基锂在催化亚胺和硼烷硼氢化反应中的应用 Download PDFInfo
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- imine
- borane
- lithium
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- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 150000002466 imines Chemical class 0.000 title claims abstract description 36
- 229910000085 borane Inorganic materials 0.000 title claims abstract description 33
- SDYMNZGECSEJAD-UHFFFAOYSA-N [Li].COC1=CC=CC=C1N Chemical compound [Li].COC1=CC=CC=C1N SDYMNZGECSEJAD-UHFFFAOYSA-N 0.000 title claims abstract description 27
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title abstract 3
- 229910052796 boron Inorganic materials 0.000 title abstract 3
- 238000005984 hydrogenation reaction Methods 0.000 title abstract 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 230000003197 catalytic effect Effects 0.000 claims abstract description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 38
- 238000006197 hydroboration reaction Methods 0.000 claims description 24
- LZPWAYBEOJRFAX-UHFFFAOYSA-N 4,4,5,5-tetramethyl-1,3,2$l^{2}-dioxaborolane Chemical group CC1(C)O[B]OC1(C)C LZPWAYBEOJRFAX-UHFFFAOYSA-N 0.000 claims description 20
- -1 boric acid ester Chemical class 0.000 claims description 18
- 230000018044 dehydration Effects 0.000 claims description 16
- 238000006297 dehydration reaction Methods 0.000 claims description 16
- 238000006392 deoxygenation reaction Methods 0.000 claims description 16
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 239000003960 organic solvent Substances 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract 2
- 125000001424 substituent group Chemical group 0.000 abstract 2
- 238000003756 stirring Methods 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 26
- 229910052786 argon Inorganic materials 0.000 description 13
- 238000001228 spectrum Methods 0.000 description 13
- VCDRAONLIPOEFL-UHFFFAOYSA-N 4-n-[4-(4-anilinoanilino)phenyl]benzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1NC(C=C1)=CC=C1NC(C=C1)=CC=C1NC1=CC=CC=C1 VCDRAONLIPOEFL-UHFFFAOYSA-N 0.000 description 4
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 4
- BITPAXWTJXOWKL-UHFFFAOYSA-N lithium;oxolane Chemical compound [Li].C1CCOC1 BITPAXWTJXOWKL-UHFFFAOYSA-N 0.000 description 4
- 125000000649 benzylidene group Chemical group [H]C(=[*])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 3
- MJSLSMOBYCYMIM-UHFFFAOYSA-N 1-(4-bromophenyl)-n-phenylmethanimine Chemical compound C1=CC(Br)=CC=C1C=NC1=CC=CC=C1 MJSLSMOBYCYMIM-UHFFFAOYSA-N 0.000 description 2
- CFBVFBIZXQEQHX-UHFFFAOYSA-N 1-(4-chlorophenyl)-n-phenylmethanimine Chemical compound C1=CC(Cl)=CC=C1C=NC1=CC=CC=C1 CFBVFBIZXQEQHX-UHFFFAOYSA-N 0.000 description 2
- MPRONVWLCPZXOB-UHFFFAOYSA-N 1-(4-fluorophenyl)-n-phenylmethanimine Chemical compound C1=CC(F)=CC=C1C=NC1=CC=CC=C1 MPRONVWLCPZXOB-UHFFFAOYSA-N 0.000 description 2
- MSWPGMRTURVKRJ-UHFFFAOYSA-N 1-(4-methoxyphenyl)-n-phenylmethanimine Chemical compound C1=CC(OC)=CC=C1C=NC1=CC=CC=C1 MSWPGMRTURVKRJ-UHFFFAOYSA-N 0.000 description 2
- PCICJNSIYHONRK-UHFFFAOYSA-N 1-(4-methylphenyl)-n-phenylmethanimine Chemical compound C1=CC(C)=CC=C1C=NC1=CC=CC=C1 PCICJNSIYHONRK-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- DJGDQBWKJYPZEF-UHFFFAOYSA-N n-(4-bromophenyl)-1-phenylmethanimine Chemical compound C1=CC(Br)=CC=C1N=CC1=CC=CC=C1 DJGDQBWKJYPZEF-UHFFFAOYSA-N 0.000 description 2
- NWCAQYVAHZWHIO-UHFFFAOYSA-N n-(4-chlorophenyl)-1-phenylmethanimine Chemical compound C1=CC(Cl)=CC=C1N=CC1=CC=CC=C1 NWCAQYVAHZWHIO-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 150000004705 aldimines Chemical group 0.000 description 1
- 229930013930 alkaloid Natural products 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 125000006575 electron-withdrawing group Chemical group 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- UVEWQKMPXAHFST-UHFFFAOYSA-N n,1-diphenylmethanimine Chemical compound C=1C=CC=CC=1C=NC1=CC=CC=C1 UVEWQKMPXAHFST-UHFFFAOYSA-N 0.000 description 1
- OEJZOCTWYUFFNN-UHFFFAOYSA-N n-(4-fluorophenyl)-1-phenylmethanimine Chemical compound C1=CC(F)=CC=C1N=CC1=CC=CC=C1 OEJZOCTWYUFFNN-UHFFFAOYSA-N 0.000 description 1
- MSFVFFZPHJPOHP-UHFFFAOYSA-N n-(4-methylphenyl)-1-phenylmethanimine Chemical compound C1=CC(C)=CC=C1N=CC1=CC=CC=C1 MSFVFFZPHJPOHP-UHFFFAOYSA-N 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- VMPITZXILSNTON-UHFFFAOYSA-N o-anisidine Chemical compound COC1=CC=CC=C1N VMPITZXILSNTON-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
Definitions
- the invention relates to the application of lithium ortho-methoxyaniline, in particular to the high-efficiency application of lithium ortho-methoxyaniline in catalytic hydroboration of imine and borane.
- the hydroboration of imines has become a research hotspot in recent years.
- the reported catalysts used in the hydroboration of imines mainly include the catalytic system of main group elements: magnesium [Manna, K .; Ji, P .; Greene, FX ; Lin, WJAm.Chem.Soc.2016,138,7488-7491], calcium [Yadav, S .; Pahar, S .; Sen, SSChem.Commun.2017,53 (33), 4562-4564], Sodium [Wu, Y .; Shan, C .; Ying, J .; Su, J .; Zhu, J .; Liu, LL; Zhao, Y. Green Chem.
- the purpose of the invention of the present invention is to provide the application of lithium o-methoxyaniline, that is, the application of lithium o-methoxyaniline as a high-efficiency catalyst to catalyze the hydroboration reaction of imine and borane.
- the present invention discloses for the first time that a simple lithium ortho-methoxyanilide can catalyze the borohydride reaction of imine under mild reaction conditions, has a high yield, and has a wide range of substrate applications.
- Cheap catalysts and mild catalytic conditions provide the possibility for industrial applications.
- the technical solutions adopted by the present invention are:
- lithium o-methoxyaniline in the catalytic hydroboration reaction of imine and borane; the chemical formula of lithium o-methoxyaniline is 2-OCH 3 PhNHLi.
- the invention also discloses a method for the borohydride reaction of lithium oxyaniline-catalyzed imine and borane, which includes the following steps: in an inert gas atmosphere under a water-free and oxygen-free environment, in a reaction bottle subjected to dehydration and deoxygenation treatment Add imine, add organic solvent, then add borane, mix well, then add catalyst o-methoxyaniline lithium, react for 1h ⁇ 2h, and terminate the reaction by exposure to air to obtain the product.
- the invention also discloses a method for preparing a borate ester by the hydroboration reaction of imine and borane, which includes the following steps: adding an imine to a reaction bottle subjected to dehydration and deoxygenation treatment in an inert gas atmosphere under an anhydrous and oxygen-free environment, Add organic solvent, then borane, mix evenly, then add catalyst o-methoxyaniline lithium, react for 1h ⁇ 2h, and terminate the reaction by exposure to air to obtain the product.
- the imine is selected from aldimine; the general chemical structure of the imine is as follows:
- R 1 or R 2 is one of an electron-withdrawing group or an electron-donating group, which may be selected from halogen, methyl, and methoxy; the borane is selected from pinacol borane.
- the amount of the catalyst may be 4% to 5% of the number of moles of imine, and the molar ratio of imine to pinacol borane is 1: 1 to 1: 1.2.
- the reaction temperature is room temperature
- the reaction time is 1 to 2 hours.
- the organic solvent is tetrahydrofuran.
- the present invention has the following advantages compared with the prior art:
- the present invention finds for the first time that a simple lithium salt of o-methoxyaniline can efficiently catalyze the borohydride reaction between imine and borane, which is highly consistent with the economical synthesis of atoms.
- the lithium o-methoxyanilinyl catalyst disclosed in the present invention has a high catalytic activity for the hydroboration reaction of imine and borane (the catalyst dosage can be 4% to 5% of the moles of imine), and the reaction conditions are mild (room temperature) , The reaction time is short (1h ⁇ 2h), and the reaction yield is high, the reaction is simple and controllable, the post-treatment is simple, and the reaction uses inexpensive THF as the solvent.
- the catalyst disclosed in the present invention has good universality for imines with different substitution positions and different electronic effects.
- Example 1 Lithium o-methoxyaniline catalyzes the hydroboration reaction of benzylidene and pinacol borane
- Example 2 Lithium o-methoxyaniline catalyzes the hydroboration reaction of benzylidene and pinacol borane
- Example 3 Lithium o-methoxyaniline catalyzes the hydroboration reaction of benzylidene aniline with pinacol borane
- Embodiment 4 Lithium orthomethoxyanilinyl catalyzes the hydroboration reaction of benzylidene and pinacol borane
- Embodiment 5 Lithium o-methoxyaniline catalyzes the hydroboration reaction of N- (p-methylbenzylidene) aniline with pinacol borane
- Example 6 Lithium o-methoxyaniline catalyzes the hydroboration reaction of N- (p-methoxybenzylidene) aniline with pinacol borane
- Example 7 Lithium o-methoxyaniline catalyzes the hydroboration reaction of N- (4-fluorobenzylidene) aniline with pinacol borane
- Example 8 Lithium o-methoxyaniline catalyzes the hydroboration of N- (4-chlorobenzylidene) aniline with pinacol borane
- Example 9 Lithium o-methoxyaniline catalyzes the hydroboration of N- (4-bromobenzylidene) aniline with pinacol borane
- Example 10 Lithium o-methoxyanilinyl catalyzes the hydroboration reaction of benzylidene-p-toluidine with pinacol borane
- Example 11 Lithium o-methoxyaniline catalyzes the hydroboration of N- (benzylidene) -4-fluoroaniline with pinacol borane
- Example 12 Lithium o-methoxyaniline catalyzes the hydroboration of N- (benzylidene) -4-chloroaniline with pinacol borane
- Example 13 Lithium o-methoxyaniline catalyzes the hydroboration reaction of N- (benzylidene) -4-bromoaniline with pinacol borane
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
提供了邻甲氧基苯胺基锂的应用,具体涉及邻甲氧基苯胺基锂在催化亚胺和硼烷的硼氢化反应中的应用。依次将催化剂、硼烷和亚胺搅拌混合均匀,反应1~2小时,暴露于空气中终止反应,反应液减压除去溶剂,得到不同取代基的硼酸酯。邻甲氧基苯胺基锂可以在室温条件下高活性的催化亚胺和硼烷的硼氢化反应,催化剂用量仅为亚胺摩尔量的4~5mol%,反应可达到90%以上的收率,与已有的催化体系相比,利用了简单的邻甲氧基苯胺基锂,反应条件温和,在优化条件下不同取代基的硼酸酯的产率可达99%。
Description
本发明涉及的邻甲氧基苯胺基锂的应用,具体涉及对邻甲氧基苯胺基锂在催化亚胺与硼烷硼氢化反应中的高效应用。
胺类化合物及其衍生物在自然界中普遍存在,尤其广泛地存在于生物界中,具有极重要的生理作用。它们是生物,化学,医药等领域中重要的有机化合物,很多药物含有胺的官能团即氨基,例如蛋白质,核酸,抗生素和生物碱中都存在氨基。胺类化合物具有多方面使用价值,应用范围十分广泛,常常被用于合成纺织品、染料、聚合物、色素和农药等。由于羰基的硼氢化反应远比亚胺的硼氢化反应容易发生,所以开发出针对不饱和C=N键的硼氢化反应的高效催化体系,对现代工业和有机合成化学都具有重要的意义。
亚胺的硼氢化反应近几年已成为研究热点,报道的催化剂应用于亚胺的硼氢化反应主要包括,主族元素的催化体系:镁[Manna,K.;Ji,P.;Greene,F.X.;Lin,W.J.Am.Chem.Soc.2016,138,7488-7491]、钙[Yadav,S.;Pahar,S.;Sen,S.S.Chem.Commun.2017,53(33),4562-4564]、钠[Wu,Y.;Shan,C.;Ying,J.;Su,J.;Zhu,J.;Liu,L.L.;Zhao,Y.Green Chem.2017,19,4169–4175];但是,目前所报道的催化体系,催化剂都相对昂贵或难以制备,或者反应时间较长且要在高温下反应,有些催化体系产率很低。所以,开发温和条件下高效催化亚胺的硼氢化反应的催化体系极其重要。
本发明的发明目的是提供邻甲氧基苯胺基锂的应用,即以邻甲氧基苯胺基锂为高效催化剂催化亚胺与硼烷发生硼氢化反应的应用。
本发明首次公开简单的邻甲氧基苯胺基锂能够在温和的反应条件催化亚胺的硼氢化反应,产率很高,具有较广的底物适用范围。廉价的催化剂以及温和的催化条件,为工业化应用提供了可能。为达到上述发明目的,本发明采用的技术方案是:
邻甲氧基苯胺基锂在催化亚胺与硼烷硼氢化反应中的应用;所述邻甲氧基苯胺基锂化学式为2-OCH
3PhNHLi。
本发明还公开了邻甲氧基苯胺基锂催化亚胺与硼烷发生硼氢化反应的方法,包括以下步骤:无水无氧环境下,惰性气体氛围中,在经过脱水脱氧处理的反应瓶中加入亚胺,加 入有机溶剂,然后加入硼烷,混合均匀,再加入催化剂邻甲氧基苯胺基锂,反应1h~2h,暴露于空气中终止反应,得到产物。
本发明还公开了亚胺与硼烷发生硼氢化反应制备硼酸酯的方法,包括以下步骤:无水无氧环境下,惰性气体氛围中,在经过脱水脱氧处理的反应瓶中加入亚胺,加入有机溶剂,然后加入硼烷,混合均匀,再加入催化剂邻甲氧基苯胺基锂,反应1h~2h,暴露于空气中终止反应,得到产物。
上述技术方案中,所述亚胺选自醛亚胺;所述亚胺的化学结构通式如下:
其中R
1或R
2为吸电子基团或给电子基团中的一种,可选自卤素,甲基,甲氧基;所述硼烷选自频哪醇硼烷。
上述技术方案中,所述催化剂用量可为亚胺摩尔数的4%~5%,亚胺与频哪醇硼烷的摩尔比为1∶1~1∶1.2。
上述技术方案中,反应温度为室温,反应时间为1~2h。
上述技术方案中,有机溶剂为四氢呋喃。
上述技术方案可表示如下:
由于上述技术方案的运用,本发明与现有技术相比有如下优点:
1.本发明首次发现简单的邻甲氧基苯胺基锂盐能高效的催化亚胺与硼烷发生硼氢化反应,高度符合原子经济合成。
2.本发明公开的邻甲氧基苯胺基锂催化亚胺与硼烷发生硼氢化反应的催化活性高(催化剂用量可为亚胺摩尔数的4%~5%),反应条件温和(室温),反应时间短(1h~2h),且反应产率高,反应简单可控,后处理简单,反应采用廉价的THF为溶剂。
3.本发明公开的催化剂对于不同取代位置、不同电子效应的亚胺有着较好的普适性。
下面结合实施例对本发明做进一步描述:
实施例一:邻甲氧基苯胺基锂催化卞叉苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的卞叉苯胺,加入100ul THF,然后用移液枪加入0.5mmol(0.0726mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为91%。产物的核磁数据:
1H NMR(CDCl3,400MHz)δ:7.29~7.12(m,9H),6.88~6.84(t,1H),4.69(s,1H),1.29(s,12H)。
实施例二:邻甲氧基苯胺基锂催化卞叉苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的卞叉苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应1h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为96%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.29~7.12(m,9H),6.88~6.84(t,1H),4.69(s,2H),1.29(s,12H)。
实施例三:邻甲氧基苯胺基锂催化卞叉苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的卞叉苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.29~7.12(m,9H),6.88~6.84(t,1H),4.69(s,2H),1.29(s,12H)。
将邻甲氧基苯胺基锂替换为式Ⅰ的胺基锂化合物,无法得到产物。
实施例四:邻甲氧基苯胺基锂催化卞叉苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的卞叉苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入31.3ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(4mol%用量),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为97%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.29~7.12(m,9H),6.88~6.84(t,1H),4.69(s,2H),1.29(s,12H)。
实施例五:邻甲氧基苯胺基锂催化N-(p-甲基苯亚甲基)苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(p-甲基苯亚甲基)苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.23~7.08(m,8H),6.89~6.85(t,1H),4.66(s,2H),2.31(s,3H),1.30(s,12H)。
实施例六:邻甲氧基苯胺基锂催化N-(p-甲氧基基苯亚甲基)苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(p-甲氧基基苯亚甲基)苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.22~7.13(d,6H),6.89~6.80(d,3H),4.63(s,2H),3.77(s,3H),1.30(s,12H)。
实施例七:邻甲氧基苯胺基锂催化N-(4-氟苯亚甲基)苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(4-氟苯亚甲基)苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.22~7.15(d,6H),6.98~6.94(d,3H),4.66(s,2H),1.30(s,12H)。
实施例八:邻甲氧基苯胺基锂催化N-(4-氯苯亚甲基)苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(4-氯苯亚甲基)苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.20~7.14(d,6H),6.99~6.93(d,3H),4.64(s,2H),1.30(s,12H)。
实施例九:邻甲氧基苯胺基锂催化N-(4-溴苯亚甲基)苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(4-溴苯亚甲基)苯 胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.24~7.16(d,6H),6.97~6.93(d,3H),4.63(s,2H),1.31(s,12H)。
实施例十:邻甲氧基苯胺基锂催化亚苄基对甲苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的亚苄基对甲苯,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.32~7.28(d,5H),7.10~7.08(d,2H),6.64~6.60(d,2H),4.62(s,2H),1.31(s,12H)。
实施例十一:邻甲氧基苯胺基锂催化N-(苯亚甲基)-4-氟苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的亚苄基对甲苯,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.24~7.02(d,7H),6.75~6.70(d,2H),4.66(s,2H),1.32(s,12H)。
实施例十二:邻甲氧基苯胺基锂催化N-(苯亚甲基)-4-氯苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(苯亚甲基)-4-氯苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(5mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.26~7.05(d,7H),6.74~6.69(d,2H),4.61(s,2H),1.30(s,12H)。
实施例十三:邻甲氧基苯胺基锂催化N-(苯亚甲基)-4-溴苯胺与频哪醇硼烷硼氢化反应
在经过脱水脱氧处理的反应瓶中,氩气保护下加入0.5mmol的N-(苯亚甲基)-4-溴 苯胺,加入100ul THF,然后用移液枪加入0.6mmol(0.0871mL)硼烷混合均匀,最后加入39.2ul邻甲氧基苯胺基锂的四氢呋喃溶液(0.6387M)(4mol%用量,下同),反应2h后,用滴管吸取一滴于核磁管中,加入CDCl
3配成溶液。经计算
1H谱产率为99%。产物的核磁数据:
1H NMR(CDCl
3,400MHz)δ:7.27~7.03(d,7H),6.76~6.71(d,2H),4.62(s,2H),1.30(s,12H)。
Claims (10)
- 邻甲氧基苯胺基锂在催化亚胺与硼烷硼氢化反应中的应用。
- 根据权利要求1所述的应用,其特征在于,邻甲氧基苯胺基锂催化亚胺与硼烷发生硼氢化反应的方法包括以下步骤:无水无氧环境下,惰性气体氛围下,在经过脱水脱氧处理的反应瓶中加入亚胺,加入有机溶剂,然后加入硼烷,混合均匀,再加入催化剂邻甲氧基苯胺基锂,室温反应1~2h,暴露于空气中终止反应,得到产物。
- 一种制备硼酸酯的方法,包括以下步骤:无水无氧环境下,惰性气体氛围中,在经过脱水脱氧处理的反应瓶中加入亚胺,加入有机溶剂,然后加入硼烷,混合均匀,再加入催化剂邻甲氧基苯胺基锂,反应得到产物硼酸酯。
- 根据权利要求4所述的方法,其特征在于,所述催化剂用量为亚胺摩尔数的4%~5%,亚胺与频哪醇硼烷的摩尔比为1∶1~1∶1.2。
- 根据权利要求4所述的方法,其特征在于,所述催化剂用量为亚胺摩尔数的5%,亚胺与频哪醇硼烷的摩尔比为1∶1.2。
- 根据权利要求4所述的方法,其特征在于,反应的温度为室温,反应的时间为1~2h。
- 根据权利要求4所述的方法,其特征在于,有机溶剂为四氢呋喃。
- 邻甲氧基苯胺基锂在制备硼酸酯中的应用。
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