The steroid 3, with three independently-addressable, rigidly-positioned fun
ctional groups, has been synthesized in an efficient, multi-gram sequence f
rom inexpensive cholic acid 1. Compound 3 should prove valuable as a starti
ng point for combinatorial libraries with preorganised, co-directed arrays
of substituents. (C) 1999 Published by Elsevier Science Ltd. All rights res
erved.