Kirk, David N.; Yeoh, Boon Leng, Journal of the Chemical Society. Perkin transactions I, 1983, # 12, p. 2945 - 2952
作者:Kirk, David N.、Yeoh, Boon Leng
DOI:——
日期:——
Syntheses of 21-hydroxy-11,19-oxidopregn-4-ene-3,20-dione and 21-hydroxy-6,19-oxidopregn-4-ene-3,20-dione
作者:A Veleiro
DOI:10.1016/0039-128x(94)00052-e
日期:1995.3
The 21-hydroxy analogues of 11,19-oxidoprogesterone and 6,19-oxidoprogesterone have been synthesized from readily available materials. Hydroxylation at C-21 was effected with iodosobenzene (from phenyliodosodiacetate and methanolic potassium hydroxide) on a 20-ketopregnane. For the 11,19-oxido derivative, the hydroxylation was carried our on a precursor containing the oxide-bridge. This approach was not adequate for the 6,19-oxido steroid due to the very low yields encountered; hence in the latter case the order of introduction of the C-21 functionality and the oxide-bridge was reversed.