Tetrahedron p. 3377 - 3386 (1985)
Update date:2022-09-26
Topics: Ring Expansion Steroid
Schneider, Gyula
Hackler, Laszlo
Sohar, Pal
The 3β-acetoxy-16β,17β-epoxymethyleneandrost-5-ene (1) transforms into the dihydrooxazine condensed to the sterane skeleton (4a,b,c,e,g,i) in a ring expansion reaction with alkyl and aryl nitriles in presence of HBF4 - diethyletherate.The 3β-acetoxy-16α,1
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