Photoreactions of 6-(1′-triazolyl)uracils. Synthesis of 7,8-disubstituted pyrrolo[2,3-d]pyrimidines and pyrimido[4,5-c]isoquinolines

Article abstract of DOI:10.1016/S0040-4039(00)92618-2

A series of 6-(1′-triazolyl)uracils 4a-f were subject to photolysis at 254 nm in acetonitrile. The C₄′, C₅′-disubstituted triazoles 4a-c afforded pyrrolo[2,3-d]pyrimidines 5a-c whereas mono-substituted triazoles gave rise to polymeri