A short synthesis of (S)-α-(diphenylmethyl)alkyl amines from amino acids
摘要:
A range of (S)-alpha-(diphenylmethyl)alkyl amines were prepared from the corresponding (S)-alpha-amino acid ester hydrochlorides. These amines were derived by direct hydrogenation of their precursor oxazolidinones. (C) 1999 Elsevier Science Ltd. All rights reserved.
[EN] AN IMPROVED ASYMMETRIC SYNTHESIS OF alpha-(DIARYLMETHYL) ALKYL AMINES<br/>[FR] SYNTHÈSE ASYMÉTRIQUE AMÉLIORÉE D'ALPHA-(DIARYLMÉTHYL)ALKYLAMINES
申请人:PIRAMAL ENTPR LTD
公开号:WO2019180627A1
公开(公告)日:2019-09-26
The present invention relates to an improved asymmetric synthesis of alpha- (diarylmethyl) alkyl amines (hereafter referred to as the compound (1)) or its pharmaceutically acceptable salt and derivatives. The process comprises an unusual substrate specific regioselective lithiation of alpha-diarylmethanes, followed by its highly diastereo selective addition to N-tert-butanesulfinylimines resulting in the selective formation of chiral alpha-(diarylmethyl) alkyl amines 4 and chiral amine 5; which on subsequently removing the sulfinyl group provides corresponding alpha-(diarylmethyl) alkyl amines (1) or relative chiral amines (1").
Asymmetric Synthesis of α-(Diarylmethyl) Alkyl Amines through Regioselective Lithiation of α-Diarylmethanes and the Diastereoselective Addition to Ellman’s Imines
A highly regio- and diastereoselective lithiation/addition of α-diarylmethanes to N-tert-butanesulfinylimines is reported. This methodology also affords the preparation of enantiomerically pure α-(diarylmethyl) alkyl amines bearing quaternary centers.
[EN] COMPOSITIONS AND METHODS FOR CYCLOFRUCTANS AS SEPARATION AGENTS<br/>[FR] COMPOSITIONS ET PROCÉDÉS POUR DES CYCLOFRUCTANES EN TANT QU'AGENTS DE SÉPARATION
申请人:UNIV TEXAS
公开号:WO2010148191A3
公开(公告)日:2011-05-19
PROCESS FOR PREPARING CHIRAL COMPOUNDS
申请人:UNIVERSITY OF DURHAM
公开号:EP1135349A1
公开(公告)日:2001-09-26
AN IMPROVED ASYMMETRIC SYNTHESIS OF ALPHA-(DIARYLMETHYL) ALKYL AMINES