摘要:
Proline was decarboxylated quantitatively to Delta(1)-pyrroline on photoirradiation in the presence of rose bengal, while its methyl ester yielded an equimolar mixture of Delta(1)- and Delta(5)-pyrroline-2-carboxylic acid methyl esters.The decarboxylation of proline took place under either an aerobic (O-2 bubbling) or an anaerobic ( N-2 bubbling) conditions, and under the latter condition, extent of the reaction depended on the amount of rose bengal employed. These results imply mechanistically that the reaction is the Type I photooxidation, indicating a new type of oxidative stress to natural secondary amines.