Photochemistry of phthaloylcysteine, its methyl ester and C-unprotected S-alkyl derivatives
作者:Axel G. Griesbeck、Joachim Hirt、Wolfgang Kramer、Paul Dallakian
DOI:10.1016/s0040-4020(98)00063-5
日期:1998.3
cysteine derivatives 1a-d were photochemically transformed by elimination, decarboxylation, and via electron transfer cyclization to the products 2,3,4 and 6–8. The spin selectivities of singlet and triplet pathways were investigated in acetonitrile and acetone. The excited singlets were prone to elimination and γ-H abstractions (e.g. formation of 5) whereas the triplets cyclized to thiazinoisoindoles