Microbiological hydroxylation of steroids. Part IV. The pattern of dihydroxylation of mono-oxygenated 5α-androstanes with cultures of the fungus Calonectria decora
作者:A. M. Bell、P. C. Cherry、I. M. Clark、W. A. Denny、Ewart R. H. Jones、G. D. Meakins、P. D. Woodgate
DOI:10.1039/p19720002081
日期:——
concerned with the relation between the pattern of the dihydroxylation by Calonectriadecora of mono-oxygenated 5α-androstane derivatives (mainly ketones), and the position of the oxygen function in the substrate. Terminal ring ketones (3, 4, 16, and 17) are converted, in useful yields, into one or two dihydroxy-ketones. (Ring B and C ketones are much less satisfactory as substrates.) The structures of most
Studies in the steroid group. Part LXXXIV. Preparation and reactions of 15-oxygenated androstanes
作者:I. M. Clark、W. A. Denny、Ewart R. H. Jones、G. D. Meakins、A. Pendlebury、J. T. Pinhey
DOI:10.1039/p19720002765
日期:——
Treatment of 15β, 16β-epoxy-5α-androstan-17-one with hydrazine and toluene-p-sulphonic acid in air gives 5α-androstan-15β-ol; this step markedly improves the chemical route to 5α-androstan-15-one from the 3-ketone. The 15-ketone is also readily obtained from 12β,15α-dihydroxy-5α-androstan-3-one (prepared by microbiological hydroxylation of 5α-androstan-3-one).Two series of substituted (mainly oxygenated)