3,5-dibromo-1-trityl-1H-1,2,4-triazole → 4-((5-bromo-2-trityl-2H-1,2,4-triazol-3-yl)(5-ethoxy-2-fluoro-3-isopropoxyphenyl)methylamino)benzonitrile

Participants

Reaction Conditions

Reaction Steps

To a solution of Intermediate 359.1 (748 mg, 1.6 mmol) in THF (10 mL) was added BuLi (1.6 M in THF, 1.02 mL, 1.6 mmol). The mixture was stirred at −78° C. for 15 min, then a solution of Intermediate 7.3 (500 mg, 1.53 mmol) in THF (5 mL) was added dropwise. The mixture was stirred at −78° C. for 30 min, before warming to 23° C., and quenching with aqueous NH4Cl. The mixture was diluted with EtOAc, washed with H2O and brine, dried (Na2SO4) and concentrated. The crude product was purified by flash chromatography (0 to 40% EtOAc/hexanes gradient) followed by preparative HPLC purification to afford 320 mg of Intermediate 359.2. LCMS (2 min gradient) RT=2.45 min, 717.2 (M+H)+; 1H NMR (400 MHz, MeOD) δ ppm 1.25-1.33 (m, 9H) 3.93(q, 2H) 4.41 (m, 1H) 6.15 (d, 2H) 6.52 (m, 1H) 6.82 (m, 1H) 7.03-7.21 (m, 18H).

Provenance & Evidence