[EN] PROCESS FOR CONVERTING A CIS-TRANS MIXTURE OF SUBSTITUTED BENZYLIDENE AMINES INTO THE PURE CIS ISOMER [FR] PROCEDE DE CONVERSION D'UN MELANGE CIS-TRANS D'AMINES DE BENZYLIDENE SUBSTITUEES EN L'ISOMERE CIS PUR
[EN] PROCESS FOR CONVERTING A CIS-TRANS MIXTURE OF SUBSTITUTED BENZYLIDENE AMINES INTO THE PURE CIS ISOMER [FR] PROCEDE DE CONVERSION D'UN MELANGE CIS-TRANS D'AMINES DE BENZYLIDENE SUBSTITUEES EN L'ISOMERE CIS PUR
Diastereoselective Synthesis of 2,3,6-Trisubstituted Piperidines
作者:John M. Humphrey、Eric P. Arnold、Thomas A. Chappie、John B. Feltenberger、Arthur Nagel、Wendy Simon、Melani Suarez-Contreras、Norma J. Tom、Brian T. O’Neill
DOI:10.1021/jo9003184
日期:2009.6.19
Stereocontrol at C-6 was accomplished by utilizing a variety of imine reduction methods. The C-2/C-6-cis stereochemistry was established via triacetoxyborohydride iminium ion reduction, whereas the trans relationship was set either by triethylsilane/TFA acyliminium ion reduction or by Lewis acid catalyzed imine reduction with lithiumaluminumhydride.
[EN] PROCESS FOR CONVERTING A CIS-TRANS MIXTURE OF SUBSTITUTED BENZYLIDENE AMINES INTO THE PURE CIS ISOMER<br/>[FR] PROCEDE DE CONVERSION D'UN MELANGE CIS-TRANS D'AMINES DE BENZYLIDENE SUBSTITUEES EN L'ISOMERE CIS PUR
申请人:PFIZER PROD INC
公开号:WO2004043908A1
公开(公告)日:2004-05-27
A process for interconverting a mixture of cis-trans erythro-threo isomers of a compound of formula I into the substantially pure cis isomer. Cis isomers of formula I are usefull intermediates in the synthesis of cis isomers of benzamide piperidine compounds which exhibit activity as NK-1 receptor antagonists.