AbstractIn connection with earlier work on the synthesis of 9β, 10α‐steroids, a new and practical synthesis of rac‐17α‐hydroxy‐des‐A‐androst‐9‐en‐5‐one (19) has been developed, based on a novel stereoselective condensation of 7‐hydroxy‐1‐nonen‐3‐one (3) with 2‐methyl‐cyclopentane‐1, 3‐dione (9) and subsequent transformations of the resulting tricyclic diene ether 12.
Steroid Total Synthesis, Part III. 9?, 10?-Testosterone
作者:G. Saucy、R. Borer
DOI:10.1002/hlca.19710540815
日期:1971.12.10
AbstractThe total synthesis of 9β, 10α‐testosterone via a BCD‐tricyclic intermediate is described. The latter compound – 17β‐hydroxy‐des‐A‐androst‐9‐en‐5‐one – was obtained in optically active form by our previously reported scheme, using an efficient resolution step early in the synthesis. New results regarding the asymmetric induction step are also discussed.