Singlet oxygen reactions of benzannelated isoquinolinones
作者:Ke-Qing Ling、Hu Cai、Jia-Hai Ye、Jian-Hua Xu
DOI:10.1016/s0040-4020(98)01186-7
日期:1999.2
Tetraphenylporphin (TPP) or methyleneblue (MB) sensitizedphotooxygenation reactions of benzannelated isoquinolinones 3 and 4 took place by initial attack of singlet oxygen on the enol ether-enamine CC double bond and proceeded via zwitterionic (10, 29) and endoperoxidic (11, 28, 30) intermediates. The product for 3 was 5 exclusively in MeCN, and 5 and the solvent trapping products 6 in MeOH. For 4, the products