One-step synthesis of 2,3-dihydronaphtho[2,3-b]thiophene-4,9-diones by a new regioselective [3 + 2] photoaddition of photogenerated 2-mercapto-1,4-naphthoquinone with alkenes
作者:Hiroshi Suginome、Kazuhiro Kobayashi、Atsushi Konishi、Hiroki Minakawa、Hideo Sakurai
DOI:10.1039/c39930000807
日期:——
2,3-Dihydronaphtho[2,3-b]thiophene-4,9-diones are formed in one-step reactions in 6–41 % yields by an unprecedented regioselective (3 + 2] photoaddition of 2-mercapto-1,4-naphthoquinone, generated by the photochemical decarbonylation of 5-hydroxynaphth[2,1-d]-1,3-oxathiol-2-one, with alkenes.
通过对 5-羟基萘并[2,1-d]-1,3-氧硫杂环戊烯-2-酮进行光化学脱羰基反应生成的 2-巯基-1,4-萘醌与烯烃进行前所未有的区域选择性 (3 + 2] 光加成,一步反应生成 2,3-二氢萘并[2,3-b]噻吩-4,9-二酮,收率为 6-41%。