Ammonium Chloride → (3-(4-(1H-Pyrazol-1-yl)benzyl)-4-chloro-2-methoxy-8-methylquinolin-6-yl)bis(1-methyl-1H-imidazol-5-yl)methanol

Participants

Reaction Conditions

Reaction Steps

n-Butyllithium (1.6 M in hexane; 0.5 mL, 0.718 mmol) was added dropwise to a suspension of the 3-(4-(1H-pyrazol-1-yl)benzyl)-6-bromo-4-chloro-2-methoxy-8-methylquinoline (0.29 g, 0.653 mmol, Intermediate 19: step b) in dry THF (4 mL) over a 2 minute period at −78° C. A heterogeneous mixture of bis(1-methyl-1H-imidazol-5-yl)methanone (0.14 g, 0.653 mmol, Intermediate 39: step b) in THF (3 mL) was added as a slurry and stirring was continued at −78° C. for 5 minutes. The resulting homogeneous mixture was warmed up to 0° C. and stirred for 10 minutes. The mixture was warmed to room temperature and saturated aqueous NH4Cl was added followed by EtOAc. H2O was added and layers were separated. The aqueous layer was again extracted with EtOAc and the combined organic extracts washed with brine, dried over Na2SO4, filtered, evaporated to dryness. The crude product was purified by chromatography (10% MeOH in CH2Cl2; gradient) to provide the title compound. 1H NMR (400 MHz, CDCl3) δ ppm 7.95-8.04 (m, 1H), 7.79-7.89 (m, 1H), 7.65-7.71 (m, 1H), 7.50-7.60 (m, 2H), 7.34-7.45 (m, 5H), 7.32 (s, 1H), 6.36-6.52 (m, 2H), 4.31 (s, 2H), 4.10 (s, 3H), 3.53 (s, 6H), 2.62 (s, 3H). mass calcd. C30H28ClN7O2, 554.05; m/z found, 554.2

Provenance & Evidence