(E)- or (Z)-perfluorinated beta-enaminoesters were prepared by direct addition of primary or secondary amines to ethyl perfluoroalkynoates without any catalyst. (C) 2002 Elsevier Science B.V. All rights reserved.
(E)-或(Z)-全氟乙基β-联氨酸酯通过直接向乙基二氟乙炔酸酯中添加一元或二元胺制备,无需催化剂。 (C) 2002 Elsevier Science B.V. All rights reserved.
Transamination of fluorinated β-keto carboxylic esters. A biomimetic approach to β-polyfluoroalkyl-β-amino acids.
作者:Vadim A. Soloshonok、Alexander G. Kirilenko、Valery P. Kukhar'、Giuseppe Resnati
DOI:10.1016/s0040-4039(00)73652-5
日期:1993.5
The base-catalyzed isomerization of N-benzylimines (or enamines) of beta-polyfluoroalkyl-beta-ketocarboxylic esters cleanly affords the N-benzylidene derivatives of beta-polyfluoro-beta-aminocarboxylic esters which are hydrolyzed to corresponding amino acids in high overall yields.
Biomimetic base-catalyzed [1,3]-proton shift reaction. A practical synthesis of β-fluoroalkyl-β-amino acids
作者:Vadim A. Soloshonok、Valery P. Kukhar
DOI:10.1016/0040-4020(96)00300-6
日期:1996.5
An efficient approach to practicalsynthesis of β-fluoroalkyl-β-aminoacids is described. The method consists in the reducing reagent-free base-catalyzedbiomimetic transamination reaction between fluorinated β-keto carboxylic esters and benzylamine. This transformation involves two sequential base-catalyzed [1,3]-proton transfers giving rise to corresponding N-benzylidene derivatives as the products
Catalytic asymmetric synthesis of β-fluoroalkyl-β-amino acids via biomimetic [1,3]-proton shift reaction
作者:Vadim A. Soloshonok、Alexander G. Kirilenko、Sergey V. Galushko、Valery P. Kukhar
DOI:10.1016/s0040-4039(00)73320-x
日期:1994.7
[1,3]-Protonshiftreaction of N-benzylenamines 1a-e, derived from β-polyfluoroalkyl-β-ketocarboxylic esters and benzylamine, was catalyzed by (-)-cinchonidine (5–13 mol %) to give good yields (67–89%) of enantiomerically enriched (up to 36% ee) N-benzylidene derivatives 3a-e. The resulting products 3a-e were readily hydrolyzed into the corresponding optically active (R)-β-polyfluoroalkyl-β-amino acids