This document was downloaded for personal use only. Unauthorized distribution is strictly prohibited. group transformations (Scheme). The choice of introducing a readily removable benzoyl protective group seemed to be more appropriate. Indeed, the hydroxyl group protection of 6 with benzoyl cyanide/triethylamine (£ 7) proceeded smoothly in high yield. Subsequent removal of the isopropylidene group under acid catalysis furnished the diol 8, ...
