Cyclic 2-(acylmethyl)-1,3-diketones are converted into 1-acyl-1H-Pyrroles in high yields by ammonium acetate in acetic acid, via rearrangement of a hydroxypyrroline intermediate.
M. P. Sammes, P. N. Maini and A. R. Katritzky, J. Chem. Soc., Chem. Commun., 1984, 354 DOI: 10.1039/C39840000354
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