The tetracyanoethylene catalysed methanolysis of 17 beta-acetoxy-4 beta,5 b
eta:6a,7 alpha-diepoxyandrostan afforded 17 beta-acetoxy-4 alpha,7 alpha-ox
ido-5 beta-hydroxy-6 beta-methoxyandrostane in which the methanolysis produ
ct of the 6 alpha,7 alpha-epoxide has participated in the cleavage of the 4
beta,5 beta-epoxide; the reaction is modified however by an adjacent 3 bet
a-hydroxy group.