反应详情

温度

60 °C

A solution of thieno[2,3-b]pyrazine-6-carboxylic acid (250 mg, 1.387 mmol), HATU (633 mg, 1.665 mmol) and DIPEA (0.459 mL, 2.77 mmol) in DMF (5 mL) was stirred for 15 min. 2-methyl-5-nitroaniline (211 mg, 1.387 mmol) was added and stirred at 60° C. for 4 h. Quenched in citric acid solution and the resulting precipitate was collected to give N-(2-methyl-5-nitrophenyl)thieno[2,3-b]pyrazine-6-carboxamide 75 (400 mg, 92%). (m/z)=315 (M+H)+.

1. customQuenched in citric acid solution
2. customthe resulting precipitate was collected