反应详情

温度

5 °C

To a stirred suspension of 4-methoxy-7-morpholin-4-yl-benzothiazol-2-yl-amine (13.3 g, 50.1 mmol) in THF (700 ml) was added N-ethyldiisopropylamine (21.3 ml, 125 mmol). The mixture was then cooled to 5° C. and a solution of 2-chloro-6-methyl-isonicotinoyl chloride (10.5 g, 55.1 mmol) in dichloromethane (350 ml) was added dropwise over 2 hours. The reaction mixture was then stirred overnight at 20° C. To this mixture was added methanol (40 ml) and stirring continued for ten minutes. The mixture was then concentrated in vacuo and the residue partitioned between ethyl acetate and saturated sodium bicarbonate solution. The organic phases were then dried over Na2SO4 and the solvent evaporated. The crude product was then chromatographed over SiO2 (Merck 230-400 mesh) eluting with CH2Cl2/MeOH (98:2), the product fractions were pooled and the solvent evaporated, to afford the title compound as a brown solid (16.0 g, 76% yield), MS: m/e=421 (M{37Cl}+H+), 419 (M{35Cl}+H+).

1. stirringstirring
2. waitcontinued for ten minutes
3. concentrationThe mixture was then concentrated in vacuo
4. customthe residue partitioned between ethyl acetate and saturated sodium bicarbonate solution
5. dry with materialThe organic phases were then dried over Na2SO4
6. customthe solvent evaporated
7. customThe crude product was then chromatographed over SiO2 (Merck 230-400 mesh)
8. washeluting with CH2Cl2/MeOH (98:2)
9. customthe solvent evaporated