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Sulfur


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The reaction of 4-nitro-1,3-diarylbutan-1-ones and ammonium acetate in the presence of morpholine and sulfur provides the corresponding 2,4-diarylpyrroles in excellent yields.
M. Adib, N. Ayashi, F. Heidari, P. Mirzaei, Synlett, 2016, 27, 1738-1742.