with water (310 ml), and dried over potassium carbonate. After removal of ether the residue was
chromatographed on an alumina column (eluent hexane and ether, 2:1) to give pure 2-(2-naphthyl)pyrrole in
98% yield with physicochemical properties and spectroscopic parameters in agreement with those published in
[22].
Devinylation of 5-Phenyl-N-vinylpyrrole-2-carbaldehyde (7). 5-Phenyl-N-vinylpyrrole-2-carbalde-
hyde (7) (0.20 g, 1 mmol) was dissolved in acetonitrile (10 ml), Hg(OAc)2 (0.16 g, 0.5 mmol) and water (5 ml)
were added, and the product was stirred at 70-80ºC using a reflux condenser. After 5 h the reaction mixture was
diluted with water, NaCl (~2 g) was added, and the product was extracted with diethyl ether (412 ml). The
ether extracts were combined, washed with water (310 ml), and dried over potassium carbonate. After removal
of ether the residue was chromatographed on an alumina column (eluent benzene) to give pure 5-phenylpyrrole-
2-carbaldehyde in 65% yield with physicochemical properties and spectroscopic parameters identical to those
published in [23].
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