Reference(s) for synthesis of 5-alpha-Androstan-17-beta-ol
Suginome, H., and Yamada, S. 1984. Photoinduced transformations. Part 73. Transformations of five- (and six-) membered cyclic alcohols into five- (and six-) membered cyclic ethers - a new method of a two-step transformation of hydroxy steroids into oxasteroids. J. Org. Chem. 49:3753-3762.