Piperidine → 5-Cyano-3-[1-(pyrrol-2-yl)ethylidene]indolin-2-one

Participants

Reaction Steps

To a suspension of 5-cyanoindolin-2-one (158 mg, 1 mmol) in ethanol (15 mL) was added 2-acetylpyrrole (95 mg, 1 mmol) and piperidine (0.1 mL). The reaction mixture was refluxed for 2 hours. A golden-colored product precipitated from the reaction mixture, which was filtered and washed with ethanol to afford 5-cyano-3-[1-(pyrrol-2-yl)ethylidene]indolin-2-one; (160 mg) 1H NMR (400 MHz, DMSO-d6) δ 2.80 (s, 3H), 6.40. (m, 1H), 7.04 (d, 1H), 7.20 (m, 1H), 7.42 (m, 1H), 7.60 (dd, 1H), 8.04 (s, 1H), 11.40 (s, 1H) ppm.

Provenance & Evidence