Sulfuryl chloride → Ethyl 2-chloro-3-(2-chlorophenyl)-3-oxopropanoate
反応式
[CH2:1]([O:3][C:4](=[O:15])[CH2:5][C:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[Cl:14])=[O:7])[CH3:2].S(Cl)([Cl:19])(=O)=O>CCOCC>[Cl:19][CH:5]([C:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[Cl:14])=[O:7])[C:4]([O:3][CH2:1][CH3:2])=[O:15]参加物
4
実験手順
To a stirred solution of 3-(2-chloro-phenyl)-3-oxo-propionicacidethylester (5.000 mL, 26.600 mmol) in ether (75.00 mL) was added dropwise sulfuryl chloride (2.800 mL, 34.600 mmol) and the resulting solution was stirred for 4 h. The reaction mixture was diluted with ether (50.0 mL) and quenched by the slow addition of a saturated aqueous solution of sodium bicarbonate (50.0 mL) and the mixture was vigorously stirred for 30 min. The organic phase was separated and dried over anhydrous MgSO4, filtered, and concentrated in vacuo to provide 6.500 g of crude product as a clear colorless oil (100%). The crude residue was used without further purification. LC/MS (AA) ES+ 261, 263. 1H NMR (400 MHz, d, CDCl3) δ: 12.47 (s, 1H), 7.49-7.32 (m, 4H), 4.39 (q, J=7.2 Hz, 2H), 1.41 (t, J=7.2 Hz, 3H).