Triethylamine → tert-Butyl 4-(4-((4-((2-(2-amino-2-oxoethyl)phenyl)ethynyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)-3-(trifluoromethoxy)phenyl)piperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a nitrogen de-gassed solution of 2-(2-ethynylphenyl)acetamide (I41) (0.029 g, 0.18 mmol) and tert-butyl 4-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)-3-(trifluoromethoxy)phenyl)piperidine-1-carboxylate (I48) (0.082 g, 0.15 mmol) in dry DMF (4 mL) were added triethylamine (0.085 mL, 0.61 mmol), triphenylphosphine (6.0 mg, 0.023 mmol), trans-dichlorobis(triphenylphosphine)palladium (II) (0.011 g, 0.015 mmol) and Cu(I)I (4.0 mg, 0.023 mmol). The reaction mixture was heated under microwave irradiation at 120° C. for 20 minutes, concentrated to dryness in vacuo and purified by silica gel chromatography (12 g Si cartridge, 0-100% EtOAc in petroleum benzine 40-60° C.) to give the title compound (I49) (0.073 g, 73% yield) as a pale yellow solid; 1H NMR (400 MHz, d6-DMSO) δ 10.11 (s, 1H), 8.74 (s, 1H), 7.58 (dd, J=7.7, 6.2 Hz, 2H), 7.53-7.47 (m, 1H), 7.42-7.27 (m, 5H), 6.99 (s, 1H), 4.14-4.03 (m, 2H), 3.67 (s, 2H), 2.87-2.72 (m, 3H), 1.79 (d, J=12.8 Hz, 2H), 1.50 (qd, J=12.5, 4.1 Hz, 2H), 1.42 (s, 9H). LCMS Method C: rt 6.63 min; m/z 564.0 [M-Boc+2H]+.

Provenance & Evidence