131249-39-3Relevant academic research and scientific papers
REACTION OF 5,6α-EPOXY-5α-CHOLESTANE AND 5,6α-EPOXY-5α-STIGMASTANE WITH BF3:ETHERATE
Shafiullah,Jamaluddin, Malik
, p. 83 - 86 (2007/10/02)
Reaction of 3β-chloro-5,6α-epoxy-5α-cholestane (1) with BF3:etherate afforded 3β-chloro-5α-cholestan-6-one (3), 3β-chloro-5β,14β-dimethyl-18,19-bisnor-10α-cholest-13(17)-en-6α-ol (4), 3β-chloro-5β-methyl-19-nor-cholest-9(10)-en-6α-ol (5) and 3β-chloro-6β-fluoro-5α-cholestan-5α-ol (6).On similar treatment 3β-acetoxy-5,6α-epoxy-5α-stigmastane (2) gave 3β-acetoxy-5α-stigmastan-6-one (7), 3β-acetoxy-5β,14β-dimethyl-18,19-bisnor-10α-stigmast-13(17)-en-6α-ol (8), 3β-acetoxy-5β-methyl-19-nor-stigmast-9(10)-en-6α-ol (9) and 3β-acetoxy-6β-fluoro-5α-stigmast-5α-ol (10).Compounds 4 and 8 and 5 and 9 were formed via "backbone" and Westphalen rearrangements.The structures of these compounds were established on the basis of spectral data and by comparison with authentic samples.
