作者:Hamish S. Sutherland、Fabio E. S. Souza、Russell G. A. Rodrigo
DOI:10.1021/jo010112o
日期:2001.5.1
A new strategy for the preparation of 11-oxygenated steroids synthesis of (±)-adrenosterone
作者:Paul A. Grieco、Scott A. May、Michael D. Kaufman
DOI:10.1016/s0040-4039(98)01526-3
日期:1998.9
Conjugate 1,4-addition of 1-[(tert-butyldimethylsilyl)oxy]-2-methyl-1,3-cyclohexadiene (5) to 2-methyl-cyclopentenone in highly polar media and subsequent alkylation of the resultant silyl enol ether (4) with phenylthiodienyl carbonate 10 in 5.0 M LiClO4·Et2O provides substrate 2. Exposure of 2 to TMSOTf/TMSOCH2CH2OTMS affords tetracyclic bis-ketal 3, which is converted into (±)-adrenosterone (1) in