Studies on A-Norsteroids. I. Synthesis of A-Nor-Δ<SUP>3(5)</SUP>-1, 2-dioxo Steroids
作者:Tokuo Kubota、Keiji Yoshida、Fumiko Hayashi、Ken'ichi Takeda
DOI:10.1248/cpb.13.50
日期:——
A number of steroidal Δ1, 4-3-ones (Va∼g) were hydroxylated with osmium tetroxide affording the 1α, 2α-dihydroxy-Δ4-3-ones (VIa∼g) and the 4α, 5α-dihydroxy-Δ1-3-ones (VIIa∼g). The former compounds (VIa∼g) were converted into the A-norsteroids having Δ3(5)-1, 2-dioxo structure (IIIa∼g) by treatment with manganese dioxide at room temperature.
许多甾体Δ1, 4-3-
酮类化合物(Va∼g)经
四氧化锇羟化后得到1α, 2α-二羟基-Δ4-3-
酮类化合物(VIa∼g)和4α, 5α-二羟基-Δ1-3-
酮类化合物(VIIa∼g)。前者(VIa∼g)在室温下通过
二氧化锰处理,转化为具有Δ3(5)-1, 2-二
氧结构的A-降
甾体化合物(IIIa∼g)。