反应详情

To a suspension of 4-(methylsulfonyl)phenylacetic acid (388 mg, 1.8 mmol) in dry DCM (5 mL) was added oxalyl chloride (320 μL, 3.6 mmol) followed by DMF (2 drops). The reaction mixture was stirred at RT for 3 hrs then the solvent was removed in vacuo. The resultant residue was taken up in DCM (2 mL) and added dropwise to a stirring solution of 5-bromo-4-methyl-3-(3-trifluoromethyl-phenyl)-pyridin-2-ylamine (Int. 1, 500 mg, 1.51 mmol) and triethylamine (420 μL, 36.02 mmol) in DCM (2 mL) at 0-5° C. The reaction mixture was stirred at 0-5° C. for 3 hrs then gradually warmed to RT over 5 hrs. The reaction mixture was partitioned between saturated sodium hydrogen carbonate solution and DCM. The organic phase was concentrated in vacuo and purified by flash chromatography eluting with a gradient of 0-100% EtOAc in cyclohexane to give the title compound as an orange glass (308 mg).

1. customthe solvent was removed in vacuo
2. stirringThe reaction mixture was stirred at 0-5° C. for 3 hrs
3. temperaturethen gradually warmed to RT over 5 hrs
4. customThe reaction mixture was partitioned between saturated sodium hydrogen carbonate solution and DCM
5. concentrationThe organic phase was concentrated in vacuo
6. custompurified by flash chromatography
7. washeluting with a gradient of 0-100% EtOAc in cyclohexane