Diethyl (ethoxymethylene)malonate → HCID 68412103, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of diethyl 3-aminopyridine 1-oxide (3.0 g, 27.3 mmol) and diethyl 2-(ethoxymethylene)malonate (11.8 g, 54.6 mmol) was heated to 130° C. under a Dean-Stark trap for 2 hours. After cooling to room temperature, the mixture was stirred with ethanol (100 mL). The solid was collected by filtration, washed with petroleum ether (100 mL) and dried in vacuo to afford the title compound (6.0 g). 1H NMR (400 MHz, MeOD) δ 8.40-8.39 (t, J=1.6 Hz, 1H), 8.36 (s, 1H), 8.01 (d, J=6.4 Hz, 1H), 7.49 (d, J=1.2 Hz, 1H), 7.46-7.44 (m, 1H), 4.22 (q, J=7.2 Hz, 2H), 4.14 (q, J=7.2 Hz, 2H), 1.08 (t, J=7.2 Hz, 6H).

Provenance & Evidence