作者:W. Kraus、C. Chassin、R. Chassin
DOI:10.1016/s0040-4020(01)82901-x
日期:——
The reduction of 1-methyl-4-tosyloxy-bicyclo[2.2.2]octan-2-one (2) with LAH proceeds by fragmentation to 1-methyl-4-hydroxymethyl-4-methylene-cyclohexane (4) without any influence of the solvent on the product composition. On the other hand the course for the reduction of 1-methy-4-tosyloxy-bicyclol 2.2.2|octanon-2-ethylene acetal (12) depends on the nature of the solvent. Suspensions of LAH in diethyl
用LAH还原1-甲基-4-甲苯氧基-双环[2.2.2] octan-2-one(2)的过程是通过裂解成1-甲基-4-羟甲基-4-亚甲基-环己烷(4)而进行的溶剂对产品成分的影响。另一方面,还原1-甲基-4-甲苯磺酰氧基-双环基2.2.2 |辛烷-2-乙烯缩醛(12)的过程取决于溶剂的性质。LAH在乙醚中的悬浮液会发生断裂反应,在四氢呋喃中的均相溶液会导致OS键断裂,从而使原始的醇11发生重整。该结果被称为对还原剂的溶剂化作用。