反应详情

2-Amino-6chloro-nicotinic acid described in Preparation Example A-1 (220 mg, 1.4 mmol), triethylamine (0.47 mL, 3.37 mmol) and benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (764 mg, 1.73 mmol) were dissolved in N,N-dimethylformamide (3 mL), 4-benzyloxy-benzylamine described in Preparation Example 1 (399 mg, 1.87 mmol) was added thereto, followed by stirring at room temperature for 17 hours 30 minutes. After the reaction was completed, the reaction solution was poured into brine, which was then extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate, then concentrated, the obtained residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:1), and the title compound (115 mg, 0.31 mmol, 22%) was obtained.

1. additionwas added
2. extractionwas then extracted with ethyl acetate
3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
4. concentrationconcentrated
5. customthe obtained residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:1)