The anhydro bases formed from the reaction of 4-picoline 1-oxides with N-substituted benzimidoyl chlorides and a strong base undergo a new molecular rearrangement to give mixtures of the side chain acylaminated (e.g.4) and acylaminoarylated products (e.g.5); 2-picoline 1-oxides behave similarly.
R. A. Abramovitch, D. A. Abramovitch and P. Tomasik, J. Chem. Soc., Chem. Commun., 1979, 956 DOI: 10.1039/C39790000956
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