A partial synthesis of 13-ethyl-11-methylene-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (desogestrel) based upon intramolecular oxidation of an 11β-hydroxy-19-norsteroid to the 18 → 11β-lactone
作者:M. J. van den Heuvel、C. W. van Bokhoven、H. P. de Jongh、F. J. Zeelen
DOI:10.1002/recl.19881070406
日期:——
A partial synthesis of the 13-ethyl-18-norsteroid desogestrel is reported. The key step in this synthesis is the intramolecular oxidation of 11β-hydroxyestr-5-ene-3,17-dione cyclic bis-(1,2-ethanediyl acetal) 3 with Pb(OAc)4 and iodine to 3,3:17,17-bis[1,2-ethanediylbis(oxy)]-11β-hydroxyestr-5-en-18-oic acid γ-lactone 2.
据报道13-乙基-18-降糖甾烷去氧孕烯的部分合成。该合成过程中的关键步骤是将11β-羟基estr-5-ene-3,17-二酮环状双-(1,2-乙二缩醛)3与Pb(OAc)4和碘分子内氧化为3,3:17 ,17-双[1,2-乙二基双(氧基)]-11β-羟基estr-5-en-18-油酸γ-内酯2。