Methylamine → (S)-N-((3-Fluoro-4-(trifluoromethoxy)phenyl)(3-fluoropyridin-2-yl)methyl)-3-(methylamino)-4-nitrobenzamide

Participants

Reaction Steps

To a solution of (S)-(3-fluoro-4-(trifluoromethoxy)phenyl)(3-fluoropyridin-2-yl)methanamine hydrochloride (1.0 g, 2.94 mmol, intermediate 6) in DMF (20 mL, Aldrich) was added 3-fluoro-4-nitrobenzenecarboxylic acid (0.543 g, 2.94 mmol, Bionet Research (A Trading Division of Key Organics Ltd)), HATU (1.228 g, 3.23 mmol, Oakwood Products, Inc.), and DIPEA (1.123 mL, 6.46 mmol, EMD Biosciences, Inc.). The resulting mixture was then stirred at room temperature for 1 h. The mixture was transferred to a pressure tube, and methylamine, 2.0M solution in THF (7.34 mL, 14.68 mmol, Aldrich) and DIPEA (1.123 mL, 6.46 mmol, EMD Biosciences, Inc.) were added. The resulting mixture was heated at 55° C. for 18 h, then cooled to room temperature. Water (150 mL) was added and the mixture was extracted with EtOAc (2×150 mL). The combined organic extracts were dried over MgSO4 and concentrated in vacuo. The residue was dissolved in DCM and the solution mixture was purified by silica gel flash column chromatography using ISCO instrument (0-100% EtOAc/hexane) to give the title compound as a yellow solid. MS (ESI, positive ion) m/z: 483 (M+H).

Provenance & Evidence