Conversion of ruscogenin into 1α- and 1β hydroxycholesterol derivatives
作者:M. Noam、I. Tamir、E. Breuer、R. Mechoulam
DOI:10.1016/s0040-4020(01)92435-4
日期:1981.1
and 3, and mesylation of position 16 followed by LAH reduction. The utility of the shift reagent Eu(dpm)3 to determine the structures of the products was studied. It was shown that the shifts induced are characteristic of the position and orientation of the OH groups, and can facilitate the elucidation of the structures of hydroxylated steroids.
Ausgehend von Cholesten-(1)-on-(3) (IV) wurden 1-Keto-cholestan (XX), 1 α-Oxy-cholestan (XVIII) und 1 β-Oxy-cholestan (XXI) auf eindeutigem Wege in Kristallen bereitet.
Ausgehend von Cholesten-(1)-on-(3)(IV)wrist克里斯塔伦(Kristallen)的1-酮胆甾醇(XX),1α-羟基胆甾烷(XVIII)和1β-羟基胆甾烷(XXI)贝雷特。
Steroids and Walden inversion. Part LX. Some reactions of the epimeric 5α-cholestan-1-ols and the solvolysis of their toluene-p-sulphonates
作者:C. W. Shoppee、Ruth E. Lack、S. C. Sharma、Lorraine R. Smith
DOI:10.1039/j39670001155
日期:——
gives a similar mixture of the same three olefins and some 5α-cholestan-1α-ol. 5α-Cholestan-1β-ol with the same reagents gives a single crystalline olefin, 9aζ A-nor-B-homo-19-norcholest-5(10)-ene, whilst solvolysis of 5α-cholestan-1β-yl toluene-p-sulphonate yields mainly the non-crystalline 9a-methylene-A-nor-B-homo-19-nor-5α-cholestane, and some 5α-cholestan-1β-ol.
5α-Cholestan-1a-ol与五氯化磷或亚硫酰氯形成5α-胆甾1-烯,1β-甲基-19-norcholest-5(10)-烯和1β-甲基-19-nor-5α的混合物-cholest-9-ene,同时在缓冲的丙酮水溶液中在65°下溶剂化5α-cholestan-1α-甲苯基对苯二甲酸磺酸盐时,得到的是相同的三种烯烃和一些5α-cholestan-1α-ol的相似混合物。使用相同试剂的5α-Cholestan-1β-ol可得到单晶烯烃9aζA-nor-B-homo-19-norcholest-5(10)-烯,同时溶剂化5α-cholestan-1β-yl甲苯-p -磺酸盐主要产生非晶的9a-亚甲基-A -nor- B -homo-19-nor-5α-胆甾烷和一些5α-胆甾烷-1β-ol。
Steroide und Sexualhormone. 202. Mitteilung. Über die Herstellung des 1-Keto-cholestans
作者:Pl. A. Plattner、A. Fürst、H. Els
DOI:10.1002/hlca.19540370506
日期:——
Es werden die Herstellung unddie Eigenschaften von 1-Keto- und 1α-Oxy-cholestan beschrieben.
描述了1-酮和1α-氧-胆甾烷的制备和性质。
The Hydration of Unsaturated Steroids by the Brown Hydroboration Reaction. I. Monounsaturated Steroids