Cooperative catalysis of molybdenum with organocatalysts for distribution of products between amines and imines
作者:Di Wu、Qingqing Bu、Cheng Guo、Bin Dai、Ning Liu
DOI:10.1016/j.mcat.2021.111415
日期:2021.3
Multi-amino groups and nitrogen donors compound was discovered as an organocatalyst for N-alkylation of alcohols with amines in the presence of Mo(CO)6. The Mo(CO)6/organocatalyst binary system has shown to be a highly active catalyst for the N-alkylation reaction between alcohols and amines with excellent tolerance of variable starting materials bearing different functional groups. Of particular note
A process for producing an amine which is characterized by reacting an imine with a nucleophilic compound (except a trialkylsilyl vinyl ether) in the presence of a phosphoric acid derivative represented by the formula (1):
wherein A
1
represents a spacer; X
1
and X
2
represent each independently a divalent nonmetal atom or a divalent nonmetal atomic group; and Y
1
is oxygen or sulfur. The invention provides a process by which amines (particularly optically active amines) useful as intermediates of medicines, agricultural chemicals, or the like can be produced without special post-treatment in high yield at high optical purity; and phosphoric acid derivatives (particularly optically active phosphoric acid derivatives) useful in the production of the amines.
A Convenient Synthesis of Aminoacids by ZnBr<sub>2</sub> Promoted Reaction of Ketene <i>bis</i>(Trimethylsilyl) Acetals with Aldimines
作者:M. Mladenova、M. Bellassoued
DOI:10.1080/00397919308009832
日期:1993.3
Abstract The ZnBr2 promoted addition of ketene bis(trimethylsilyl) acetals to aromatic aldimines affords β-arylaminoacids in good to excellent yields. Under the same reaction conditions vinylic ketene bis(trimethylsilyl) acetals give exclusively or mainly δ - phenylaminoacids.
Synthesis of benzo[f]quinoline derivatives by condensation of N-arylmethylene-2-naphthylamines with acetylcyclohexane and 1-acetylcyclohexene
作者:V. I. Grachek
DOI:10.1007/s11176-005-0094-4
日期:2004.11
N -Arylmethylene-2-naphthylamines react with acetylcyclohexane and 1-acetylcyclohexene under mild conditions to afford 2-aryl-2-(2-naphthylamino)ethyl cyclohexyl and 1-cyclohexenyl ketones, respectively. Under more severe conditions (110°C), the reaction is accompanied by cyclization with formation of 3-aryl-1-cyclohexyl(or 1-cyclohexenyl)benzo[ f ]quinolines. Proper choice of the amount of catalyst
N- 芳基亚甲基-2-萘胺在温和条件下与乙酰基环己烷和1-乙酰基环己烯反应,分别得到2-芳基-2-(2-萘基氨基)乙基环己基和1-环己烯基酮。在更苛刻的条件下(110℃),反应伴随环化,形成3-芳基-1-环己基(或1-环己烯基)苯并[ f ]喹啉。催化剂,温度和反应时间的量的适当选择允许中间体3-芳基-1-环己基(或1-环己烯基)-3,4-二氢苯并[隔离 ˚F 〕喹啉。
Role of imine isomerization in the stereocontrol of the Staudinger reaction between ketenes and imines
作者:Fernando P. Cossío、Abel de Cózar、Miguel A. Sierra、Luis Casarrubios、Jaime G. Muntaner、Bimal K. Banik、Debasish Bandyopadhyay
DOI:10.1039/d1ra06114c
日期:——
allowed determining that the stereochemistry of the Staudinger reaction between ketenes and imines is strongly associated with the nature of the imine, which affects the two steps of the reaction. The first step, namely the nucleophilic attack of the sp2-hybridized nitrogen atom of the imine on the sp-hybridized carbon atom of the ketene, is affected by the energetically accessible in situ isomerization