1,3-Dihydro-5-phenyl-2H-1,4-benzodiazepin-2-ones unsubstituted in the 1-position rearrange to 1-acetyliso-indoles in the presence of acetic anhydride and pyridine. The structure of the rearranged products has been established by alternative syntheses, and the mechanism of the rearrangement is discussed.
R. I. Fryer, B. Brust, J. V. Earley and L. H. Sternbach, J. Chem. Soc. C, 1967, 366 DOI: 10.1039/J39670000366
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