A simplified synthesis of 32-oxygenated lanosterol derivatives.

Abstract
A simplified synthesis of lanost-8-ene-3.beta.,32-diol, lanost-7-ene-3.beta.,32-diol, 3.beta.-hydroxylanost-8-en-32-al, and 3.beta.-hydroxylanost-7-en-32-al, in which 3.beta.-acetoxylanostan-7.alpha.-ol prepared by the hydrogenation of 3.beta.-acetoxylanost-8-en-7-one is the key compound, is described.