The behaviour of the furazan-N-methanide analogue of the furoxan system. Ring expansion: new routes to 6H-1,2,5-oxadiazines. A combined experimental and theoretical study

Abstract

Desilylation of N-trimethylsilylmethyl- and deprotonation of N-methyl-l,2,5-oxadiazolium (furazan) salts gave ring expansions to 6H-l,2,5-oxadiazines; the results of 6-31G calculations on the expected furazan-N-methanide intermediate are reported.