[CH2:1]([O:3][C:4](=[O:15])[CH:5](O)[C:6]1[CH:11]=[CH:10][C:9]([S:12][CH3:13])=[CH:8][CH:7]=1)[CH3:2].O=S(Cl)[Cl:18]>C(Cl)Cl.[NH4+].[Cl-]>[CH2:1]([O:3][C:4](=[O:15])[CH:5]([Cl:18])[C:6]1[CH:11]=[CH:10][C:9]([S:12][CH3:13])=[CH:8][CH:7]=1)[CH3:2]To a solution of the hydroxy-(4-methylsulfanyl-phenyl)-acetic acid ethyl ester of Step 2 (1.0 eq) in CH2Cl2 (0.2M) was added SOCl2 (5 eq). The resulting mixture was stirred at room temperature for 12 h, poured in saturated aqueous NH4Cl and extracted with Et2O (2×). The combined organic extracts were washed with brine, dried over MgSO4, filtered and concentrated. Flash chromatography (Hex:EtOAc; 9.5:0.5) afforded the desired compound as a yellow solid.
Wird geladen…
