Tetrahydrofuran → (4S,5R)-5-(3,5-Difluorophenyl)-3-{[2-(3-fluoroazetidin-1-yl)-5-(5-isopropyl-2-methoxypyridin-3-yl)pyrimidin-4-yl]methyl}-4-methyl-1,3-oxazolidin-2-one

Participants

Reaction Conditions

Reaction Steps

1,1′-Bis(di-tert-butylphosphino)ferrocene palladium dichloride (25.07 mg, 0.038 mmol) was added to a degassed THF (15 mL)/Water (3 mL) solution of (4S,5R)-3-{[5-bromo-2-(3-fluoroazetidin-1-yl)pyrimidin-4-yl]methyl}-5-(3,5-difluorophenyl)-4-methyl-1,3-oxazolidin-2-one (INTERMEDIATE 15, 200 mg, 0.385 mmol), 5-isopropyl-2-methoxypyridin-3-ylboronic acid (128 mg, 0.462 mmol) and K2CO3 (159 mg, 1.154 mmol). After further de-gassing with N2 and vacuum, the reaction was heated for 1 h at 50° C. LCMS showed complete conversion to product. The reaction was diluted with 50 mL ethyl acetate and poured into 100 mL sat′d NH4Cl soln. The ethyl acetate layer was washed with brine (100 mL) filtered through a 20 g plug of sodium sulfate, eluting with 50 mL ethyl acetate. The filtrate was concentrated prior to purification with an X-Bridge 21.2×150 mm RP column. The sample was loaded in 7:3:1 CH3CN/water/DMSO (5 mL), after which a 10-100% acetonitrile/water (0.1% NH4OH) linear gradient at 15 mL/minutes over 20 minutes was run. The product of interest eluted in 80% portion of above gradient. Pure fractions (rich cut; impure discarded) were concentrated and lyophilized to give product as a white solid. LCMS (M+H)+: 528.5. 1H NMR (500 MHz, CDCl3): δ 8.15 (s, 1H), 8.10 (d, J=2.1 Hz, 1H), 7.35 (d, J=2.1 Hz, 1H), 6.84 (m, 3H), 5.52 (m, 1.5H), 5.42 (m, 0.5H), 4.64 (d, J=17.3 Hz, 1H), 4.51 (m, 2H), 4.33 (m, 2H), 4.02 (d, J=17.4 Hz, 1H), 3.94 (s, 3H), 2.96 (m, 1H), 1.30 (d, J=6.9 Hz, 6H), 0.77 (d, J=6.6 Hz, 3H). RTA IC50: 16 nM.

Provenance & Evidence