RADICALOID INTERMEDIATES IN THE PHOTOCHEMISTRY OF 6-CYANOPHENATHRIDINE N-OXIDE

Article abstract of DOI:10.1016/S0040-4039(00)85730-5

Irradiation of 6-cyanophenanthridine N-oxide in presence of 2,3-dimethyl-2-butene resulted in a novel type of photoaddition with rearrangement to give 2-cyano-8,8,9,9-tetramethyl--dibenzo-1,3-oxazonin and 6-(2-cyano-1,1,2-trimethylpropyloxy)phenanthridine as a minor product, which is regarded as strong evidence for an initial photochemical generation of a biradical, and not an oxaziridine as previously suggested.