Facile decomposition of 9-substituted 9-xanthydrols in basic media. Dependence of reaction behavior on structure and metal ion
作者:Rafik Karaman、Ibraheem T. Badejo、James L. Fry
DOI:10.1021/ja00198a082
日期:1989.8
have Rsub 3}COH yields} Rsub 2}C double bond} O + RH (1) decompositions of alcohols by free-radical pathways. Theoretical and experimental studies of the mechanisms of alkoxide decompositions have considered both heterolytic and homolytic pathways. Here they report the observation of unusual facile fragmentation of the alkoxides of several 9-substituted-9-xanthydrols in THF or Csub 6}Dsub 6} by
空间拥挤的叔醇可能会碎裂成酮和烃(方程式 1)。已经报道了醇盐在凝聚相和气相中离子分解为碳负离子和羰基化合物,以及 Rsub 3}COH 产量} Rsub 2}C 双键} O + RH (1) 分解醇通过自由基途径。醇盐分解机制的理论和实验研究已经考虑了异裂和均裂途径。在这里,他们报告了在 THF 或 Csub 6}Dsub 6} 中通过离子或自由基过程观察到的几种 9-取代-9-xanthydrols 的醇盐的异常容易碎裂,这取决于取代基的性质和金属。