Non-destructive Removal of the Bornanesultam Auxiliary in ?-SubstitutedN-Acylbornane-10,2-sultanis under Mild Conditions: An efficient synthesis of enantiomerically pure ketones and aldehydes
作者:Wolfgang Oppolzer、Christophe Darcel、Patrick Rochet、Stephane Rosset、Jef De Brabander
DOI:10.1002/hlca.19970800502
日期:1997.8.11
two-step procedure involving a known mercaptolysis reaction followed by an [Fe(acac)3]-mediated coupling of the resulting S-benzyl thioesters with Grignard reagents. Furthermore, enantiomerically pure aldehydes 23 can be obtained from α-substituted N-acylbornane-10,2-sultams 6via a one-step reduction with (i-Bu)2AIH. No epimerization at the α-chiral center is observed during the cleavage reaction whereby