M. Shimizu et al., Stereocontrol in the reduction of meso-imides using oxazaborolidine, leading to a facile synthesis of (+)-deoxybiotin, TETRAHEDR L, 40(50), 1999, pp. 8873-8876
Highly enantioselective reduction of meso-imides was conducted using oxazab
orolidine derived from L-threonine and borane-THF complex to give lactams i
n high enantiomeric purity. This methodology was successfully applied to th
e synthesis of (+)-deoxybiotin in an enantio-controlled manner in good over
all yield. (C) 1999 Elsevier Science Ltd. All rights reserved.