Photocyclization of coumarinoyl enamides revisited: [2+2+2] cycloreversion/cycloaddition mechanism
作者:Sivanna Chithanna、Ding-Yah Yang
DOI:10.1039/d1nj00352f
日期:——
The major and minor products for the photocyclization of coumarinoyl enamides were identified. Controlled and intermediate-trapping experiments indicate that the formation of the minor isomer involved a stepwise, radical [2+2+2] cycloreversion/cycloaddition mechanism. Deuteriumlabeling studies suggest that the photocyclization of both aroyl and alkenoyl enamides involved a [1,5] hydrogen shift as