Studies on Diazepines. VI. Photolysis of 1H-1, 2-Diazepine and Azepine Epidioxides

Abstract

The photolysis of 1H-1, 2-diazepine 4, 7-epidioxides (1) with a low pressure mercury lamp resulted in the formation of 5-ethoxy-1, 3, 4-oxadiazoles (3), azoxy compounds (4), and diene compounds (5). A reasonable mechanism for the formation of the products may involve initial isomerization to the 1, 2, 3-oxadiazoles (8), followed by decomposition and isomerization. However, the azepine 2, 5-epidioxide (2) gave only the diene compound (6) in a low yield and did not give any other characterized products.