Heterocyclic rearrangements. Part XIII. The conversion of a nitro-2,1-benzisoxazole into an acylbenzofurazan, and some unsuccessful rearrangements and oxygen transfer reactions

Abstract

3-Methyl-7-nitro-2,1-benzisoxazole is converted by trimethylphosphite into 4-acetylbenzofurazan. The preparation is described of several indazoles and benzotriazoles as possible precursors for analogous rearrangements. 1,10-Phenanthroline 1-oxide fails to undergo intramolecular oxygen transfer.