Photochemical Eliminations Involving Zwitterionic Intermediates Generated via Electrocyclic Ring Closure of Benzothiophene Carboxanilides
作者:Majher Sarker、Tasnuva Shahrin、Mark G. Steinmetz
DOI:10.1021/ol102932y
日期:2011.3.4
Leaving groups such as carboxylate, thiolate, and phenolate are expelled via zwitterionic intermediates produced upon photochemical electrocyclic ring closure of benzothiophene carboxanilides in the triplet excited state. Chemical yields generally exceed 90%, while quantum yields vary with basicity of the released leaving group.
经由三重激发态的苯并噻吩羧酰苯胺的光化学电环闭合时产生的两性离子中间体,将诸如羧酸根,硫醇根和酚酸根之类的离去基团排出。化学收率通常超过90%,而量子收率随释放的离去基团的碱性而变化。