Photochemical Synthesis of Condensed Triazole N-Oxide

Photochemistry of nitro and nitroso compounds

“…Because of the photolability of nitrosoalkane monomers and dimers (Section V.A) irradiation must use -400 nm light to give good yields. Without such precautions, the photoreactions of nitrosoalkanes described in equations (1 33)- ( 144) can complicate the overall reaction and retard the yields. Using ESR spectroscopy, dialkyl, alkoxyl, alkyl and acyl nitroxides, arising from secondary photoprocesses, have been d e t e~t e d~l~-~'~.…”

“…On the basis of the product patterns, the proposed major processes218 are summarized in equations (1 34)-( 144); may be formal representations of more intricate processes and have other variations. However, observed products from nitrosoalkane photolysis can be accounted for by combinations of equations (134)-(144). In alcoholic solution, intermediates are rapidly dissipated by solvolysis (equation 136), but in benzene processes other than solvolysis dominate the overall pattern.…”