of 7α-hydroxymethylbicycl4o[3.3.1]- nonan-3-one (1) gave 7β-methylbicyclo[3.3.1]nonan-3 β-ol (2), a product formed as a result of the transannular 1,6-hydride shift enforced by relief of the stenc constraint in the system. Another example of the intramolecular hydride transfer on the same basis was observed in the deketalization of 9,9-disubstituted 7,7-ethylenedioxybicyclo[3.3.1 ]- nonan-3 β-ol (13
黄-敏隆还原7α-羟甲基bicycl4o [3.3.1]-壬基-3-酮(1)得到7β-甲基双环[3.3.1] nonan-3β-醇(2),其产物是通过减轻系统中的Stenc约束来强制执行跨环1,6-
氢化物移位。在9,9-二取代的7,7-
乙烯二氧双环[3.3.1]-壬基-3β-醇(13和18)的脱
缩酮反应中,观察到了基于相同基础的分子内
氢化物转移的另一个例子β-(2-羟基乙氧基)双环[3.3.1]壬南-3-酮(15和20)。