Photolysis of cyclic enol esters in the presence or absence of a single electron transfer photosensitizer
作者:M.J. Climent、H. García、S. Iborra、M.A. Miranda、J. Primo
DOI:10.1016/s0040-4020(01)96217-9
日期:1991.11
The photochemistry of enol esters 1 is dominated by electrocyclic ring opening (1b → 3+4), 1,3-acyl migration (1c,d → 6c,d) and [2 + 2] dimerization (1d → 11). Photosensitization with triphenylpyrylium tetrafluoroborate (TPT) enhances formation of oxidation products (1b → 5,1c,d → 9c,d + 10c,d), presumably through the intermediacy of radical cations 1b–d+.
烯醇酯1的光化学以开环(1b → 3 + 4),1,3-酰基迁移(1c,d → 6c,d)和[2 + 2]二聚作用(1d →11)为主。光敏与triphenylpyrylium四氟硼酸盐(TPT)增强的氧化产物(形成1B → 5,1C,d →图9c,d + 10C,d),推测是通过自由基阳离子的中间性1B-d +。