Methanol → HCID 69589137, compound

Participants

Reaction Steps

A solution of 5-amino-3-[1-(pyrrol-2-yl)ethylidene]indolin-2-one (360 mg, 1.5 mmol) in tetrahydrofuran (15 mL) was treated with ethyl isocyanatoacetate (195 mg, 1.5 mmol) at ambient temperature. After stirring overnight, methanol (5 mL) was added and the reaction was concentrated. Chromatography on SiO2 (7.2 g) using 1:2 hexane/ethyl acetate afforded 5-(N′-(ethoxycarbonylmethyl)ureido)-3-[1-(pyrrol-2-yl)ethylidene]indolin-2-one; 1H NMR (400 MHz, DMSO-d6) δ 1.32 (t, 3H), 2.82 (s, 3H), 3.96 (d, 2H), 4.22 (q, 2H), 6.44 (m, 2H), 6.88 (d, 1H), 7.16 (m, 1H), 7.28 (d, 1H), 7.40 (m, 1H), 7.96 (m, 1H), 8.76 (s, 1H), 11.02 (s, 1H) ppm; (200 mg).

Provenance & Evidence