The synthesis of 2α,3α-isopropylidenedioxy-6,6-ethylenedioxy-5α-androst-15-en-17-one and its 2β,3β-isomer
作者:R. P. Litvinovskaya、A. V. Baranovsky、M. A. Averkova、V. A. Khripach
DOI:10.1134/s1068162007030089
日期:2007.5
Androstane and Delta(15)-androstane analogues of brassinosteroids were synthesized from dehydroepiandrosterone. The key stage, hydroxylation of 17 beta-acetoxyandrost-2-en-6-one double bond with OsO4, yielded the corresponding 2 alpha,3 alpha- and 2 beta,3 beta-diols. The target 2 alpha,3 alpha-isopropylidenedioxy-6,6-ethylenedioxy-5 alpha-androst-15-en-17-one and its 2 beta,3 beta-isomer were obtained by dehydrosilylation of the corresponding silylenol ethers with palladium acetate.