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

Participants

Reaction Conditions

Reaction Steps

To a nitrogen de-gassed solution of methyl 2-(2-ethynylphenyl)acetate (I4) (0.137 g, 0.788 mmol) in dry DMF (7 mL) were added triethylamine (0.366 mL, 2.63 mmol) followed by tert-butyl 3-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylate (I24) (0.300 g, 0.657 mmol), triphenylphosphine (0.026 g, 0.098 mmol), trans-dichlorobis(triphenylphosphine) palladium(II) (0.046 g, 0.066 mmol) and CuI (0.019 g, 0.098 mmol). The reaction mixture was heated under microwave irradiation at 120° C. for 20 minutes and then concentrated to dryness in vacuo and purified by silica gel chromatography (Biotage Isolera, 40 g Si cartridge, 0-70% EtOAc in petroleum benzine 40-60° C.) to give the title compound (I25) (0.310 g, 79% yield) as a yellow sticky oil; 1H NMR (400 MHz, d6-DMSO) δ 10.44 (s, 1H), 8.81 (s, 1H), 7.73-7.60 (m, 3H), 7.54 (td, J=7.6, 1.3 Hz, 1H), 7.50-7.34 (m, 2H), 7.24 (d, J=8.6 Hz, 2H), 4.02-3.87 (m, 4H), 3.61 (s, 3H), 2.90-2.51 (m, 4H), 1.88 (d, J=12.0 Hz, 1H), 1.76-1.55 (m, 2H), 1.51-1.34 (m, 10H). LCMS Method C: rt 6.98 min; m/z 539.2 [M−C4H9(t-Bu)+H]+.

Provenance & Evidence