Both syn- and anti-bicyclopropane derivatives have been efficiently pr
epared with good relative and absolute stereocontrol using reagent con
trolled asymmetric cyclopropanation reactions. Double Simmons-Smith cy
clopropanation of 2,4-dien-1-ols stereoselectively gave the correspond
ing anti-bicyclopropane derivatives. Copyright (C) 1996 Elsevier Scien
ce Ltd