Synthetic steroids. Part VI. Some reactions of 1α,5-cyclo-5α-cholest-2-ene
作者:S. B. Laing、P. J. Sykes
DOI:10.1039/j39680000937
日期:——
Peroxidation of 1α,5-cyclo-5α-cholest-2-ene with p-nitroperoxybenzoic acid yields 2α,3α-epoxy-1α,5-cyclo-5α-cholestane which upon lithium aluminium hydride reduction gives 1α,5-cyclo-5α-cholestan-2α-ol. Oxidation of this alcohol gives 1α,5-cyclo-5α-cholestan-2-one which can be reduced to 5α-cholestan-2-one, to 1α,5-cyclo-5α-cholestane and to 1(10→5α)abeo-cholestan-2-one by hydrogen and catalytic platinum
1α,5-环-5α-胆甾-2-烯与对硝基过氧苯甲酸的过氧化反应生成2α,3α-环氧-1α,5-环-5α-胆甾烷,氢化铝锂还原后得到1α,5-环-5α -胆固醇2α-醇。氧化该醇可生成1α,5-环5α-胆甾烷-2-酮,可还原为5α-胆甾烷-2-酮,1α,5-环5α-胆甾烷和1(10→5α)琥珀酸-cholestan-2-one分别通过氢和催化铂,Huang-Minlon还原和在液态氨中的锂还原。相同的环丙基酮加溴化氢得到5β-溴胆甾烷-2-酮,可通过用碱处理从中再生环丙基。