C(O)(C(F)(F)F)=O.[Cl:8][C:9]1[CH:10]=[CH:11][C:12]([O:29][CH3:30])=[C:13]([C:15]2[N:16]=[C:17]([CH3:28])[S:18][C:19]=2[NH:20]C(=O)OC(C)(C)C)[CH:14]=1>C(Cl)Cl.O>[Cl:8][C:9]1[CH:10]=[CH:11][C:12]([O:29][CH3:30])=[C:13]([C:15]2[N:16]=[C:17]([CH3:28])[S:18][C:19]=2[NH2:20])[CH:14]=1TFA (4.0 mL) was added to a solution of tert-butyl 4-(5-chloro-2-methoxyphenyl)-2-methylthiazol-5-ylcarbamate (315 mg, 0.89 mmol) in DCM (10 mL) and water (3 drops). The reaction mixture was stirred for 1.5 hours at room temperature, then evaporated to dryness to give 215 mg (95%) of 4-(5-chloro-2-methoxyphenyl)-2-methylthiazol-5-amine as a yellow solid. LCMS (ESI) m+H=255.2.
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