Allylic oxidation of unsaturated spiroketals.
作者:Margaret A Brimble、Michael K Edmonds、Geoffrey M Williams
DOI:10.1016/s0040-4039(00)88531-7
日期:1990.1
Allylic bromination of the bicyclic spiroketals (4a-c) gave predominantly the axial bromides (6), (9) and (12) which underwent S(N)2 displacement to the equatorial alcohols (7), (11) and (14) respectively using KO2/18-crown-6 in THF/DMSO (10:1).