Sodium Bicarbonate → (R)-6'-Chloro-5'-fluoro-2-(3-hydroxypyrrolidin-1-yl)-N-(4-(trifluoromethoxy)phenyl)-[3,3'-bipyridine]-5-carboxamide

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Reaction Conditions

Reaction Steps

(R)-5-Bromo-6-(3-hydroxypyrrolidin-1-yl)-N-(4-(trifluoromethoxy)phenyl)nicotinamide (Stage 35.1, 300 mg, 0.672 mmol) and 2-chloro-3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (346 mg, 1.345 mmol) were dissolved in DME (2.7 mL). A solution of 2 M NaHCO3 (1.01 mL, 2.03 mmol) was added, the RM was flushed with argon and Pd(PPh3)2Cl2 (56.6 mg, 0.081 mmol) was added. The RM was stirred under argon at 95° C. for 2 h in a capped pressure safe tube. After cooling to RT, the RM was dissolved in EtOAc, and washed with brine. The organic phase was dried over Na2SO4 and evaporated to dryness under reduced pressure. The crude product was purified by flash chromatography (RediSep® Silica gel column, DCM/MeOH from 2% to 5% MeOH), followed by a second purification (RediSep® Silica gel column, n-hexane/EtOAc, 50 to 100% EtOAc) and treatment with Si-Thiol (200 mg) in MeOH to afford the title compound as a white powder. HPLC (Condition 4) tR=5.63 min, UPLC-MS (Condition 7) m/z=497.1 [M+H]+; 1H-NMR (400 MHz, DMSO-d6) δ ppm 1.65-1.80 (m, 1H) 1.80-1.91 (m, 1H) 2.87 (d, J=10.56 Hz, 1H) 3.18-3.28 (m, 2H) 3.33-3.50 (m, 1H) 4.20 (br. s, 1H) 4.86 (d, J=3.52 Hz, 1H) 7.34 (d, J=8.99 Hz, 2H) 7.84 (d, J=8.99 Hz, 2H) 7.99-8.11 (m, 2H) 8.34 (s, 1H) 8.77 (d, J=2.35 Hz, 1H) 10.16 (s, 1H).

Provenance & Evidence