Phosphorus oxychloride → (S)-N-(1-(6-chloro-3-(4-chloro-1-methyl-3-(methylsulfonamido)-1H-indazol-7-yl)pyridin-2-yl)-2-(3,5-difluorophenyl)ethyl)-2,2,2-trifluoroacetamide

Participants

Reaction Conditions

Reaction Steps

(S)-3-(4-chloro-1-methyl-3-(methylsulfonamido)-1H-indazol-7-yl)-2-(2-(3,5-difluorophenyl)-1-(2,2,2-trifluoroacetamido)ethyl)pyridine 1-oxide (57C, 1.0 g, 1.66 mmol) was treated with POCl3 (2.32 mL, 24.84 mmol). The reaction mixture was stirred at 115° C. for 2 hours. Upon cooling, the reaction was concentrated in vacuo, taken in DCM, and vigorously stirred with saturated aqueous NaHCO3 for 1 hour. The organic layer was collected, and the aqueous layer was extracted an additional time with DCM. The combined organic layers were dried over Na2SO4, filtered, concentrated in vacuo, and purified by silica gel column chromatography, eluting with 0-100% EtOAc in hexanes to give the title compound. MS (m/z) 622.13 [M+H]+.

Provenance & Evidence