Potassium Acetate → (4-(N-(5-cyclopropyl-2-(4-fluorophenyl)-3-(methylcarbamoyl)benzofuran-6-yl)methylsulfonamido)-2-(difluoromethyl)phenyl)boronic acid

온도

80 °C

A solution of 6-(N-(4-bromo-3-(difluoromethyl)phenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide (0.20 g, 0.33 mmol), potassium acetate (0.13 g, 1.32 mmol), PdCl2(dppf)-CH2Cl2 adduct (0.027 g, 0.033 mmol), and bis(pinacolato)diboron (0.25 g, 0.99 mmol) in 1,4-dioxane (4.12 ml) was degassed, purged with nitrogen and heated at 80° C. for 3 h 45 mins. The reaction mixture was diluted with EtOAc and water, filtered through celite, and evaporated. The brown residue was dissolved in 10 mL THF, and 5 mL 1M HCl. NaIO4 (0.56 g, 2.63 mmol) was added and the suspension was stirred for 1 h and diluted with EtOAc and water. The organic layer was washed with water, brine, dried (Na2SO4), filtered, evaporated and purified by reverse phase chromatography (5-100% CH3CN/H2O (0.1% formic acid)) to afford the title compound (0.085 g, 45%) as a white solid. 1H NMR (400 MHz, METHANOL-d4) δ ppm 7.90-7.97 (m, 2H), 7.87 (s, 1H), 7.43-7.61 (m, 3H), 7.30 (s, 1H), 7.21-7.29 (m, 2H), 6.65-7.01 (m, 1H), 3.33 (s, 3H), 2.94 (s, 3H), 2.08-2.21 (m, 1H), 0.35-1.10 (m, 4H). LCMS (m/z, ES+)=573.3 (M+H+).

1. custompurged with nitrogen
2. additionThe reaction mixture was diluted with EtOAc and water
3. filtrationfiltered through celite
4. customevaporated
5. dissolutionThe brown residue was dissolved in 10 mL THF
6. washThe organic layer was washed with water, brine
7. dry with materialdried (Na2SO4)
8. filtrationfiltered
9. customevaporated
10. custompurified by reverse phase chromatography (5-100% CH3CN/H2O (0.1% formic acid))

ORD 기록

ord-a27a600fadaa4b3796b1b66bdb1235b8

출처 데이터셋

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US09119868B2