Seven new N-substituted 3,4-dimethylpyrroles were obtained in situ through the reaction of an amine ((L)-phenylalanine, (L)-tryptophan, (L)-leucine, (L)-methionine, 1-phenethylamine, aniline or dodecylamine) and a mixture of unstable sulfur-containing compounds derived from the reaction of amino acids in Allium cepa and plant enzyme alliinase. In addition, a plausible reaction mechanism for the synthesis of N-substituted 3,4-dimethylpyrroles was displayed.
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