[CH3:1][C:2]1[N:3]=[C:4]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([F:18])([F:17])[F:16])[CH:10]=2)[S:5][C:6]=1[CH2:7]O.S(Cl)([Cl:21])=O.C(=O)(O)[O-].[Na+]>C(Cl)(Cl)Cl>[Cl:21][CH2:7][C:6]1[S:5][C:4]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([F:18])([F:17])[F:16])[CH:10]=2)=[N:3][C:2]=1[CH3:1]To a solution of [4-methyl-2-(3-trifluoromethyl-phenyl)-thiazol-5-yl]-methanol (1.2 g, 4.4 mmol) in chloroform (7 ml) was added thionyl chloride (0.64 ml, 8.8 mmol) at −10° C. under an argon atmosphere. The reaction mixture was stirred for 30 min, saturated aqueous sodium bicarbonate solution/ice water 1/1 was added and the layers were separated. The aqueous layer was extracted two times with dichloromethane. The combined organic layers were washed with ice water/brine 1/1 and dried over sodium sulfate. The solvent was evaporated in vacuo to give the title compound (1.2 g, 4.1 mmol, 94%) as yellow oil which was used in the next step without further purification.
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