作者:A. K. Nazarov、N. V. Sigay、I. V. Zavarzin、I. S. Levina
DOI:10.1007/s11172-014-0701-9
日期:2014.9
6-Methylidene-16α,17α-cyclohexapregn-4-ene-3,20-dione, a precursor of mecigestone, was synthesized from 16α,17α-cyclohexapregn-4-ene-3,20-dione in three steps. The key step of the synthesis is the Vilsmeier formylation to give 3-methoxy-3,5-diene steroid derivative.
通过三个步骤从 16α,17α-环己基孕甾-4-烯-3,20-二酮合成了 6-亚甲基-16α,17α-环己基孕甾-4-烯-3,20-二酮。合成的关键步骤是通过 Vilsmeier 甲酰化反应得到 3-甲氧基-3,5-二烯甾体衍生物。