Dimethyl malonate → HCID 135834128, compound

Participants

Reaction Steps

Dimethyl malonate (0.31 ml, 2.7 mmol) was added at room temperature to a stirred solution of sodium (0.065 g, 2.7 mmol) dissolved in dry methanol (8 ml) under nitrogen. A solution of 1-phenyl-4-formyl-5-amino-1,2,3-triazole (Bull. Soc. Chim. Belg., 1988, 97, 85-86) (0.50 g, 2.66 mmol) in dry methanol (4 ml) was added and the mixture was stirred for 18 h. The white suspension was diluted with water (50 ml) and the solids were collected and dissolved in dichloromethane-methanol (2:1, 100 ml). The solution was washed with aqueous citric acid (1 M, 50 ml), dried (Na2SO4), filtered and concentrated to give 3-phenyl-5-oxo-6-methoxycarbonyl-4H-1,2,3-triazolo[4,5-b]pyridine (0.353 g, 49%) as a white powder. δH (360 MHz; DMSO) 3.89 (3H, s), 7.56 (1H, t, J=7.5), 7.68 (2H, dd, J=7.5 and 7.5), 8.09 (2H, d, J=7.5), 8.92 (1H, s) and 12.67 (1H, br s); m/z (ES+) 271 (M+H+).

Provenance & Evidence