3,4,5-Trimethoxybenzaldehyde → 2-Amino-3-cyano-4-(3,4,5-trimethoxyphenyl)-7-methyl-4H-pyrrolo[2,3-h]chromene

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Reaction Steps

To a mixture of 3,4,5-trimethoxybenzaldehyde (53 mg, 0.27 mmol), 4-hydroxy-1-methylindole (40 mg, 0.27 mmol) and malononitrile (18 mg, 0.27 mmol) in 1.5 mL of ethanol was added piperidine (0.01 ml, 0.1 mmol). The solution was stirred at room temperature overnight and precipitates were observed. The precipitates were collected by filtration and dried to yield 70 mg (66%) of title compound as white solids. 1H NMR (CDCl3): 7.06-7.02 (m, 2H), 6.80 (d, J=8.1 Hz, 1H), 6.57 (d, J=2.4 Hz, 1H), 6.42 (s, 2H), 4.79 (s, 1H), 4.66 (s, 2H), 3.81-3.78 (m, 12H).

Provenance & Evidence