Acid-catalyzed rearrangement of K-region arene oxides: observation of ketone intermediates and a sterically induced change in rate-determining step
作者:Nashaat T. Nashed、Jane M. Sayer、Donald M. Jerina
DOI:10.1021/ja00058a016
日期:1993.3
K-region arene oxides rearrange to phenols in acetonitrile in two acid-catalyzed steps: rapid rearrangement of the arene oxide to positionally isomeric keto tautomers of K-region phenols, followed by slow enolization. Accumulation of the ketones, proposed intermediates in the acid-catalyzed solvolyses of arene oxides in aqueous solution, allowed their direct spectroscopic observation and characterization
K 区芳烃氧化物在乙腈中通过两个酸催化步骤重排为苯酚:将芳烃氧化物快速重排为 K 区苯酚的位置异构酮互变异构体,然后缓慢烯醇化。酮的积累是水溶液中芳烃氧化物的酸催化溶剂分解中提出的中间体,首次允许在溶剂分解条件下直接进行光谱观察和表征。报告了苯并 [a] 蒽的 K 区芳烃氧化物、其 1-、4-、7-、11-、12-甲基和 7,12-二甲基取代衍生物苯并 [a] 的速率常数和产物芘、苯并[c]菲、3-溴菲、屈、二苯并[a,h]蒽、菲和芘