Trifluoroacetic acid → 6-Morpholino-5-(1H-pyrazol-5-yl)-N-(4-(trifluoromethoxy)phenyl)nicotinamide

Participants

Reaction Conditions

Reaction Steps

5-Bromo-6-morpholino-N-(4-(trifluoromethoxy)phenyl)nicotinamide (Stage 18.1, 100 mg, 0.224 mmol), 1-(tetrahydro-2H-pyran-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (125 mg, 0.448 mmol), Pd(Ph3P)4 (25.9 mg, 0.022 mmol) and K3PO4 (190 mg, 0.896 mmol) and toluene (1.121 mL) were added to a MW vial, which was sealed, evacuated/purged with argon and the RM was stirred for 16 h at 110° C. The RM was diluted with DME (2 mL), treated with Si-Thiol (Silicycle, 1.44 mmol/g, 93 mg, 0.134 mmol), centrifuged, the supernatant was filtered and the solvent was evaporated off under reduced pressure to give a residue which was purified by flash chromatography (RediSep® Silica gel column, 4 g, cyclohexane/EtOAc from 10% to 60% EtOAc). The fractions containing pure product were combined and the solvent was evaporated off under reduced pressure to give a residue which was treated with TFA (500 μL, 6.49 mmol) and DCM (1.5 mL) and then stirred at RT for 4.5 h. The RM was diluted with DCM (30 mL) and washed with water, sat. aq. NaHCO3, brine and dried over Na2SO4. The solvent was evaporated off under reduced pressure to give a crude product which was purified by preparative SFC (Column Diol, from 20% to 25% in 6 min) to yield the title product as a white solid. UPLC-MS (Condition 3) tR=1.0 min, m/z=434.2 [M+H]+; 1H-NMR (400 MHz, DMSO-d6) δ ppm 3.07-3.25 (m, 4H) 3.55-3.75 (m, 4H) 6.62-6.82 (m, 1H) 7.36 (d, J=8.53 Hz, 2H) 7.54-7.88 (m, 1H) 7.85-7.92 (m, 2H) 8.20-8.40 (m, 1H) 8.76 (d, J=2.13 Hz, 1H) 10.44 (br. s, 1H) 13.02-13.31 (m, 1H).

Provenance & Evidence