New reactions of pyrroles. I. pyridylethylpyrroles

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Abstract
Pyrroles with unsubstituted 2‐ and/or 5‐positions are found to react with 4‐vinyl‐pyridine, giving hitherto unreported 2‐ and 2,5‐di‐ pyridylethylpyrroles. Pyrrole‐2‐carboxylic acids can also react to give the same products by displacement of the carboxyl group. Pyridylethylation at an available 3‐ and/or 4‐position was not observed. Catalytic reductions and alkylations of the resulting piperidylethylpyrroles are also reported.