[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.