Triethylamine → 6-((3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)ethynyl)nicotinonitrile

Participants

Reaction Conditions

Reaction Steps

A mixture of (4S,6S)-4-(5-ethynyl-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (70 mg, 0.220 mmol), 6-bromonicotinonitrile (60.4 mg, 0.330 mmol), triethylamine (92 μl, 0.660 mmol), tetrakis (25.4 mg, 0.022 mmol), and copper(I) iodide (8.38 mg, 0.044 mmol) in 2 mL of THF in a microwave vial was heated at 80° C. for 20 min. The reaction mixture was filtered and purified by reverse-phase preparative HPLC using a Phenomenex Gemini column, 10 micron, C18, 110 Å, 150×30 mm, 0.1% TFA in CH3CN/H2O, gradient 10% to 70% over 16 min. The desired fractions were combined, neutralized with 1N NaOH, extracted with 3×25 mL of DCM, dried over Na2SO4 and concentrated to afford the title compound as a white solid: 49 mg, 53% yield. MS m/z=421.0 [M+H]+. Calculated for C20H13F5N4O: 420.1.

Provenance & Evidence