反应详情

2-Mercaptonicotinic acid (90 g, 0.58 mol) was suspended in N,N-dimethylformamide (660 mL) under ice-cooling, then carbonyldiimidazole (110 g, 0.70 mol) was added thereto, and the whole was stirred for 2 hours at room temperature. Water (5.4 mL) was added thereto, and the whole was stirred for 40 minutes, and then 3,5-xylidine (76 mL, 0.61 mol) was added thereto and the resulting mixture was stirred at 60° C. for 16 hours. The mixture was allowed to stand, and then water (1.3 L) was added, and the precipitated solid was filtered off. The solid was dried at 45° C. under reduced pressure to give 130 g of the title Reference Compound as a yellow solid (Yield: 89%).

1. temperaturecooling
2. stirringthe whole was stirred for 40 minutes
3. stirringthe resulting mixture was stirred at 60° C. for 16 hours
4. filtrationthe precipitated solid was filtered off
5. customThe solid was dried at 45° C. under reduced pressure