Dimethyl Sulfoxide → n-(4-(2-Formyl-6-(4-(trifluoromethyl)phenyl)pyrimidin-4-yloxy)benzo[d]thiazol-2-yl)acetamide

Participants

Reaction Conditions

Reaction Steps

To a solution of N-(4-(2-(hydroxymethyl)-6-(4-(trifluoromethyl)phenyl)-pyrimidin-4-yloxy)benzo[d]thiazol-2-yl)acetamide (80 mg, 0.174 mmol, Example 98) in DCM (2 mL) was added oxalyl chloride (0.35 mL, 2M solution in DCM, 0.7 mmol, Aldrich). The mixture was cooled to −78° C., and a solution of DMSO (0.1 mL, 1.4 mmol) in DCM (0.5 mL) was added dropwise with stirring. The reaction mixture was stirred at −78° C. for 2 h, TFA (141 mg, 1.4 mmol) was added dropwise, and the mixture was allowed to reach room temperature. The reaction mixture was partitioned between water (10 mL) and DCM (10 mL). The organic phase was separated, washed with sat. aqueous solution of sodium bicarbonate, dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure to give the crude title compound, which was used in the next step without additional purification. MS (ESI, pos. ion) m/z: 459 (M+1).

Provenance & Evidence