[EN] ENANTIOSELECTIVE SYNTHESIS OF ?-AMINO-a,ß-UNSATURATED CARBOXYLIC ACID DERIVATIVES<br/>[FR] SYNTHÈSE ÉNANTIOSÉLECTIVE DE DÉRIVÉS D'ACIDES CARBOXYLIQUES G-AMINO-?,?-INSATURÉS
申请人:NOVARTIS AG
公开号:WO2010055162A1
公开(公告)日:2010-05-20
Provided is an enantioselective, palladium-catalyzed method for the preparation of γ-amino-α,β-unsaturated carboxylic acid derivatives having the formulas II, III, IV and VIII.
提供了一种手性选择性的钯催化方法,用于制备具有 II、III、IV 和 VIII 公式的γ-氨基-α,β-不饱和羧酸衍生物。
Highly Selective Synthesis of Enantiopure (S,E)-α,β-Unsaturated γ-Amino Esters Through a Sequential Reaction of Ethyl Dibromoacetate with α-Amino Aldehydes Promoted by Chromium Dichloride
作者:José M. Concellón、Carmen Méjica
DOI:10.1002/ejoc.200700515
日期:2007.11
A sequentialreaction of ethyldibromoacetate with various enantiopure N,N-dibenzyl- or N-Boc-α-amino aldehydes (derived from natural α-amino acids), promoted by chromiumdichloride, afforded optically active (S,E)-α,β-unsaturatedγ-aminoesters. The C=C double bond was generated with total or very high E-selectivity and the (S,E)-α,β-unsaturatedγ-aminoesters were obtained with complete enantiomeric
Stereoselective synthesis of β-amino hydroxylamines
作者:Manfred T. Reetz、Dirk Röhrig、Klaus Harms、Gernot Frenking
DOI:10.1016/s0040-4039(00)78492-9
日期:1994.11
Chiral gamma-N,N-dibenzylamino-substituted alpha,beta-unsaturated carboxylic acid esters and dicarboxylic acid esters, prepared in enantiomerically pure form from L-amino acids, under go diastereoselective Michael addition reactions with nitrogen nucleophiles of the type Me(3)SiNHOSiMe(3) and CH3NNOH; the products are novel beta-amino hydroxylamine derivatives having two defined stereogenic centers.
Stereoselective Michael additions of nitromethane yielding 3R(1S N-substituted aminoethyl)pyrrolidines
作者:Janet S. Plummer、Lori A. Emery、Michael A. Stier、Mark J. Suto
DOI:10.1016/s0040-4039(00)60391-x
日期:1993.11
The 1,4-addition of nitromethane to vinylogous esters of N-protected amino acids proceeded with good to excellent yields and with good diastereoselectivity.