Neighboring group participation and rearrangement in hypobromous acid addition to 10β-vinyl-cholestanes
作者:Pavel Kočovsky、František Tureček
DOI:10.1016/s0040-4039(01)92974-0
日期:1981.1
Hypobromousacidaddition to the diol Ia yields two epimeric dibromo 6β,19a-epoxides III and IV in a 83:17 ratio. Under the same conditions the 6β-acetoxy derivative Ib gives three products: III (46%), its epimer VII (5%) and the spyrocyclic ketone V (49%).