Studies on steroids. Part 37. Synthesis of the four stereoisomers of 20,22-epoxycholesterol
Abstract
All four stereoisomers of 20,22-epoxycholesterol were synthesized from (20E)-cholesta-5,20(22)-dien-3β-ol. The configurational assignments were based on the analogy with the corresponding 5,6-dihydro-derivatives, prepared by stereochemically unequivocal routes.