反应详情

2-methyl-5-nitrobenzoic acid (659 mg, 3.64 mmol) was heated to reflux in SOCl2 (6 mL) for 1 h. After cooling to room temperature and concentrating to dryness, the crude acid chloride was taken up in CH2Cl2 (25 mL). Pyrimidine-2,5-diamine 7 (400 mg, 3.64 mmol) was added to the solution and the mixture was allowed to stir at rt over night. The mixture became a thick white suspension. NEt3 (700 L, 4.73 mmol) was added. After 2 h, a thick white suspension remained. The mixture was filtered through a Buchner funnel and washed with copious amounts of CH2Cl2 to remove NEt3HCl salt, affording N-(2-aminopyrimidin-5-yl)-2-methyl-5-nitrobenzamide 8 as an off-white solid.

1. concentrationconcentrating to dryness
2. filtrationThe mixture was filtered through a Buchner funnel
3. washwashed with copious amounts of CH2Cl2
4. customto remove NEt3HCl salt