反应详情

To a solution of 2,6-dichloronicotinamide (1 g, 5.24 mmol) and methyl 4-aminobenzoate (0.950 g, 6.28 mmol) in THF (30 mL) was added lithium bis(trimethylsilyl)amide (18.32 mL, 18.32 mmol) at −78° C. The reaction mixture was stirred for 10 min. The dry ice bath was removed and the reaction mixture was stirred at rt for 3.5 h. The reaction mixture was diluted with water and the resulting yellow precipitate was filtered to give 1.7 g of methyl 4-(3-carbamoyl-6-chloropyridin-2-ylamino)benzoate as a yellow solid.

1. customThe dry ice bath was removed
2. stirringthe reaction mixture was stirred at rt for 3.5 h
3. additionThe reaction mixture was diluted with water
4. filtrationthe resulting yellow precipitate was filtered