作者:J.M. Coxon、R.P. Garland、M.P. Hartshorn、G.A. Lane
DOI:10.1016/s0040-4020(01)92982-5
日期:1970.1
Reaction of 3-p-tolylsulphonyloxy-4,5-epoxy-cholestanes with collidine gives 1-methyl- and 4-methyl-19-nor-cholesta-1,3,5(10)-trienes, 4a-oxa-choleste-3,5-diene and Δ2-4,5-epoxycholestenes. Reaction of the epoxy-tosylates with Li2CO3-N,N-dimethylformamide gives 4a-oxa-cholesta-3,5-diene and Δ2-4,5-epoxy-cholestenes and C-3 substitution products.
3-对甲苯磺酰氧基-4,5-环氧胆甾烷与可力丁的反应得到1-甲基和4-甲基-19-去甲胆甾烯-1,3,5(10)-三烯,4a-氧杂胆甾烯- -3,5-二烯和Δ 2 -4,5- epoxycholestenes。环氧甲苯磺酸酯与锂的反应2 CO 3 -N,N-二甲基甲酰胺使图4a氧杂-胆甾-3,5-二烯和Δ 2 -4,5-环氧cholestenes和C-3取代产物。