Photochemical reactions of thiobenzamides bearing an allylic substituent on the nitrogen atom: double-bond migration via tandem 1,4- and 1,6-hydrogen transfer
作者:Hiromu Aoyama
DOI:10.1039/a700247e
日期:——
N-(2-Phenylprop-2-enyl)thiobenzamides 1a–d
underwent
double-bond migration on irradiation to give
N-(2-phenylprop-1-enyl)thiobenzamides 2a–d via
consecutive 1,4- and 1,6-hydrogen transfer. Photoreaction of an
N-(prop-2-enyl)thiobenzamide 1e and an
N-(3-phenylprop-2-enyl)thiobenzamide 1f did not give migration
products, but afforded pyrroles 3e and 3f and dealkylation products 4a
in low yields.
N-(2-苯丙-2-烯基)硫代苯甲酰胺 1a–d 在照射下发生双键迁移,生成 N-(2-苯丙-1-烯基)硫代苯甲酰胺 2a–d,经历了连续的 1,4- 和 1,6-氢转移。N-(丙-2-烯基)硫代苯甲酰胺 1e 和 N-(3-苯丙-2-烯基)硫代苯甲酰胺 1f 的光反应未生成迁移产物,但以低产率生成了吡咯 3e 和 3f 及去烷基化产物 4a。