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.
A. J. Boulton, I. J. Fletcher and A. R. Katritzky, J. Chem. Soc. C, 1971, 1193 DOI: 10.1039/J39710001193
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