Photochemical reactions of mercapto/amino substituted alkyl phenylglyoxylates induced by intramolecular electron transfer
作者:Shengkui Hu、Douglas C. Neckers
DOI:10.1016/s0040-4020(97)00044-6
日期:1997.2
normal NorrishtypeII cleavage products, the title compounds undergo intermolecular electrontransfer from the heteroatom (sulfur/nitrogen) to the excited carbonyl group, followed by proton transfer and subsequent closing of the resulting biradicals to produce seven-membered (2)/five-membered (11) lactones in high yield. Thiadialkyl phenylglyoxylates (9) react inefficiently due to intramolecular self-quenching