Novel Photoreactions of 2-Aza-1,4-dienes in the Triplet Excited State and via Radical-Cation Intermediates. 2-Aza-di-π-methane Rearrangements Yielding Cyclopropylimines and<i> N</i>-Vinylaziridines
作者:Diego Armesto、Olga Caballero、Maria J. Ortiz、Antonia R. Agarrabeitia、Mar Martin-Fontecha、M. Rosario Torres
DOI:10.1021/jo034452g
日期:2003.8.1
2-aza-1,4-dienes, by using 9,10-dicyanoanthracene (DCA) as an electron-acceptor sensitizer and biphenyl as cosensitizer, brings about regioselective formation of N-vinylaziridines. Under these conditions, azadiene 1 also affords cyclopropylimine 37, resulting from an aryl-di-pi-methane rearrangement. This result demonstrates that di-pi-methane reactions can also take place via radical-cation intermediates