(4-Chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(2,6-dimethylpyridin-3-yl)methanol → (4-Chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(2,4-dimethylthiazol-5-yl)(1-methyl-1H-1,2,3-triazol-5-yl)methanol

Participants

Reaction Conditions

Reaction Steps

To a flask containing 6-bromo-4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline (500 mg, 116 mmol, Intermediate 47: step d) was added THF (15 mL) at room temperature which resulted in a colorless homogeneous mixture. The solution was cooled to −70° C. which remained homogeneous and then n-butyllithium (2.5 M in hexanes, 0.45 mL, 1.13 mmol) was added drop wise. The color of the solution became a dark brown. After 1 minute, (2,4-dimethylthiazol-5-yl)(1-methyl-1H-1,2,3-triazol-5-yl)methanone (275 mg, 1.24 mmol in 2 mL THF, Intermediate 48: step b) was introduced and the color of the mixture went from dark brown to greenish to light orange color all within 1 minute. The mixture was allowed to warm to 0° C. over 45 minutes at which time the reaction was quenched with aqueous NH4Cl solution. The mixture was diluted further with water and extracted with EtOAc, 3×45 mL. The combined organics were washed with brine, dried over MgSO4, filtered and concentrated to give a light orange foam. The crude was chromatographed on silica gel (initially using 10% CH3CN-toluene then changing to 80% CH3CN-DCM) to afford the title compound as an off white solid. MS m/e 574.1 [M+H]+. 1H NMR (500 MHz, CDCl3) δ ppm 8.14 (d, J=2.1 Hz, 1H), 7.85 (d, J=8.8 Hz, 1H), 7.56-7.48 (m, 3H), 7.39 (d, J=8.1 Hz, 2H), 7.21-7.13 (m, 1H), 4.44-4.64 (m, 1H), 4.34 (s, 2H), 4.09 (s, 3H), 3.91 (s, 3H), 2.57 (s, 3H), 2.36 (s, 3H), 2.13 (s, 3H). Example 79A was separated into its individual enantiomers using the following conditions: Chiralpack OD, 80% heptanes: 20% ethanol; wavelength=242 nM to provide the two enantiomers. The first eluting enantiomer was Example 79B and the second eluting enantiomer was Example 79C.

Provenance & Evidence