57097-40-2Relevant articles and documents
Photolysis of 2-Azidopyridine 1-Oxides. A Convenient Synthesis of 1,2-Oxazines
Abramovitch, Rudolph A.,Dupuy, Claude
, p. 36 - 37 (2007/10/02)
Photolysis or thermolysis of 2-azidopyridine 1-oxides (1) in benzene leads to nitrogen-elimination and ring-opening followed by recyclisation to give 6-cyano-1,2-oxazines (5) which then usually rearrange thermally to 2-cyano-1-hydroxypyrroles (2); the photolyses provide a ready, high-yield route to 1,2-oxazines.