作者:Axel G. Griesbeck、Harald Mauder、Ingrid Müller、Eva-Maria Peters、Karl Peters、Hans Georg von Schnering
DOI:10.1016/0040-4039(93)85100-b
日期:1993.1
Photodecarboxylation of N-phthaloyl derivatives of methionine sulfoxide 1b and methionine sulfone 1c was observed in acetone as the major reaction. For 1a a fast electron transfer initiated cyclization which leads to the bicyclization product 3 (X-ray structure) was observed in the sensitized photolysis. Direct photolysis of 1a leads preferentially to the tricyclic product 4 and the decarboxylation product 5. The methionine methyl esters 6a-c showed electon transfer initiated cyclization (for 6a) and disproportionation (for 6b), whereas 6c proved to be photostable.