反应详情

To a solution of 5-chloro-pyrazine-2-carboxylic acid methyl ester (Preparation 41, 85 g, 492 mmol) in DMF (365 mL) was added DIPEA (129 mL, 738 mmol) and piperidine (58.4 mL, 591 mmol) and the resulting solution was stirred at room temperature for 18 hours. The reaction mixture was poured onto water (4 L) and the resulting precipitate was collected by filtration to give the title compound as a white solid (85.12 g) in a 78% yield.

1. additionThe reaction mixture was poured onto water (4 L)
2. filtrationthe resulting precipitate was collected by filtration