Facile intramolecular ene reactions of steroidal unsaturated acyloins
作者:Brian A. Marples、Christopher D. Spilling
DOI:10.1016/s0040-4020(01)88481-7
日期:1992.1
relatively low temperature (200°C) intramolecularenereaction of 4,5-seco-5β-cholest-3-en-5-ol-6-one followed by in situ rearrangement affords 3-methl-B-nor-5β-cholest-2-en-4-one and 5-hydroxy-5β-cholestan-6-one and supports the view that 3β-methyl-A-nor-5β-cholestan-5-ol-6-one arises from 3β-tosyloxy-5ξ-cholestane-5,6β-diols in the presence of KOBuτ by similar enereactions.