反应详情

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 (0.500 g; 1.8 mmol) in dry THF (30 mL) under nitrogen was added isobutyl chloroformate (0.47 mL; 3.6 mmol), followed by triethylamine (0.51 mL; 3.6 mmol). The mixture was stirred for 1 hours, and then cyclopropylamine (0.206 g; 3.6 mmol) was added, and stirring continued for a further 3 hours. The precipitate was filtered, washed with water (5×20 mL) and diethyl ether (2×15 mL) to yield the title compound as a pale yellow solid (0.278 g; 49%). δH (DMSO-d6) 8.94 (1H, s), 8.41 (1H, s), 8.22 (1H, d, J=4.3), 3.89 (3H, s), 2.88 (1H, m), 0.66-0.76 (4H, m).

1. stirringstirring
2. waitcontinued for a further 3 hours
3. filtrationThe precipitate was filtered
4. washwashed with water (5×20 mL) and diethyl ether (2×15 mL)