2,4-Dichloropyrimidine → Tert-butyl 5-[(2-chloropyrimidin-4-yl)amino]-1-methyl-1H-benzimidazol-2-yl(phenyl)carbamate

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl 5-amino-1-methyl-1H-benzimidazol-2-yl(phenyl)carbamate (1.03 g, 3.0 mmol) in THF (3 ml) and ethanol (9 ml) was added NaHCO3 (0.76 g, 9.0 mmol) and 2,4-dichloropyrimidine (0.89 g, 6.0 mmol) and the reaction was heated to 75° C. After 5 h, the reaction was filtered hot and concentrated to a gray foam. The crude material was purified on silica gel to give the title compound as a white foam (0.98 g, 73%). 1H NMR (300 MHz, d6-DMSO) δ 10.00 (s, 1H), 8.10 (d, J=5.7 Hz, 1H), 7.89 (s, 1H), 7.58 (d, J=9.0 Hz, 1H), 7.36-7.39 (m, 5H), 7.24-7.34 (m, 1H), 6.70 (d, J=6.0 Hz, 1H), 3.73 (s, 3H), 1.40 (s, 9H).

Provenance & Evidence