反应详情

To a solution of methyl 4-amino-6-chloro-4′-(dimethylamino)-[1,1′-biphenyl]-3-carboxylate, (Intermediate 47) (416 mg, 1.365 mmol) and ethyl 2-(3-methyl-1H-pyrazol-1-yl)acetate (Alinda Chemical Ltd, 275 mg, 1.638 mmol) in THF (8.4 mL) stirred under nitrogen at room temperature was added KHMDS 1M/THF (4.09 mL, 4.09 mmol) The reaction mixture was stirred at room temperature for 20 min before being quenched with MeOH, evaporated in vacuo and taken up in water (10 mL). The aqueous layer was acidified to pH=6-7 and filtered. The precipitate obtained was washed with acetonitrile, then with diisopropyl ether and filtered to give the title compound 7-chloro-6-(4-(dimethylamino)phenyl)-4-hydroxy-3-(3-methyl-1H-pyrazol-1-yl)quinolin-2(1H)-one (415 mg, 73.2% yield) as a light yellow powder. LCMS: (M+H)+=395; Rt=2.68 min. HRMS: calculated for C21H20ClN4O2 (M+H)+: 395.1275. found: 395.1283.

1. custombefore being quenched with MeOH
2. customevaporated in vacuo
3. filtrationfiltered
4. customThe precipitate obtained
5. washwas washed with acetonitrile
6. filtrationwith diisopropyl ether and filtered