反应详情

温度

60 °C

N,N′-Carbonyidiimidazole (1.62 g, 10 mmol) was added to a stirred solution of 2,3-dihydrobenzo[1,4]dioxine-5-carboxylic acid(1.64 g, 10 mmol) in tetrahydrofuran (25 mL) and the resulting solution was heated at 60° C. for 15 minutes. The solution was cooled to room temperature and -4-(aminomethyl)pyridine (1.08 g, 10 mmol) was added. The reaction mixture was heated at 60° C. for 2 hours, cooled, poured into water, and extracted 3 times with ethyl acetate. The combined ethyl acetate extract was dried (Na2SO4) and evaporated in vacuo to a crystalline residue which was triturated with water, filtered, and dried in vacuo to give 2,3-dihydrobenzo[1,4]dioxine-5-carboxylic acid (pyridin-4-ylmethyl)amide as a white solid (1.95 g, 72%); m.p. 120-121° C.

1. temperatureThe solution was cooled to room temperature
2. temperatureThe reaction mixture was heated at 60° C. for 2 hours
3. temperaturecooled
4. extractionextracted 3 times with ethyl acetate
5. extractionThe combined ethyl acetate extract
6. dry with materialwas dried (Na2SO4)
7. customevaporated in vacuo to a crystalline residue which
8. customwas triturated with water
9. filtrationfiltered
10. customdried in vacuo