2-Methylpyridine → 2-methyl-N-(2-(pyridin-2-yl)-1,1-bis(3-(trifluoromethoxy)phenyl)-ethyl)propane-2-sulfinamide

Participants

Reaction Conditions

Reaction Steps

2-Picoline (0.20 mL, 2.0 mmol) was stirred in anhydrous Et2O (20 mL) at 0° C. under Argon. nBuLi (2.5 M in hexanes, 0.84 mL, mmol) was added dropwise. The reaction mixture turned to dark brown, and stirred at 0° C. for 20 min, then at room temperature for 1 h. It was cooled back to 0° C., and (R)—N-(bis(3-(trifluoromethoxy)phenyl)-methylene)-2-methylpropane-2-sulfinamide (prepared as described in Example 82, Procedure 11) (0.906 g, 2.0 mmol) in Et2O (4.0 mL) was added dropwise. The mixture was stirred at 0° C. for 1 h. then at room temperature for 1 h. The reaction was quenched by addition of sat'd NH4Cl. EtOAc was added; the organic layer was washed with H2O and brine, dried (Na2SO4), filtered, and concentrated to dryness. The residue was purified by flash chromatography (silica gel, EtOAc/Hexanes=0 to 100%) to give 2-methyl-N-(2-(pyridin-2-yl)-1,1-bis(3-(trifluoromethoxy)phenyl)-ethyl)propane-2-sulfinamide as light tan solids (0.19 g with recovery of 0.59 g of starting material, yield: 48% based on recovery of the starting material). LC-MS (ESI) 547.38 (M+H), retention time=3.90 min (10-90% MeOH in H2O with 0.1% TFA in a 4-min run); 1H NMR (400 MHz, CDCl3) δ ppm 8.36-8.44 (m, 1H), 7.90 (m, 1H), 7.51 (d, J=8.59 Hz, 1H), 7.37 (td, J=7.83, 2.27 Hz, 2H), 7.19-7.24 (m, 2H), 7.11-7.17 (m, 3H), 6.98-7.07 (m, 2H), 6.75 (d, J=7.83 Hz, 1H), 4.15 (d, J=13.90 Hz, 1H), 3.81 (d, J=13.90 Hz, 1H), 1.25-1.33 (m, 9H)

Provenance & Evidence