Electron-transfer induced intramolecular [2 + 2] cyloaddition of 2,6-diarylhepta-1,6-dienes
摘要:
Intramolecular [2 + 2] cycloaddition of 2,6-diaryl-1.6-heptadienes 1a-c to bicycloheptanes 2 can be induced by electron-transfer photosensitization with 9,10-dicyanoanthracene. A stepwise mechanism involving cyclic 1,4-cation radical 3 has been proposed based on the trapping experiments.
Intramolecular [2 + 2] cycloaddition of 2,6-diaryl-1.6-heptadienes 1a-c to bicycloheptanes 2 can be induced by electron-transfer photosensitization with 9,10-dicyanoanthracene. A stepwise mechanism involving cyclic 1,4-cation radical 3 has been proposed based on the trapping experiments.