Triethylamine → 2-(3-Methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazin-8-yl)-N-(prop-2-ynyl)thiazole-4-carboxamide

Participants

Reaction Steps

To a solution of 3-(imino(3-methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazin-8-yl)methylthio)-2-oxopropanoic acid (0.65 g; 2.2 mmol) in dry THF (30 mL) under nitrogen was added isobutyl chloroformate (0.60 mL; 4.4 mmol), followed by triethylamine (0.62 mL; 4.4 mmol). The mixture was stirred for 1 hour, and then propargylamine (0.28 mL; 4.4 mmol) was added, and stirring continued for a further 3 hours. The precipitate was washed with water (5×15 mL) and diethyl ether (2×15 mL) to yield the title compound as a pale yellow solid (0.250 g; 36%). δH (DMSO-d6) 3.13 (1H, m), 3.89 (3H, s), 4.10 (2H, m), 8.47 (1H, s), 8.68 (1H, t, J=5.9), 8.95 (1H, s).

Provenance & Evidence