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

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl 4-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)-3-ethylphenyl)piperidine-1-carboxylate (I41) (283 mg, 0.584 mmol), methyl 2-(2-ethynylphenyl)acetate (I4) (122 mg, 0.700 mmol), copper(I) iodide (17 mg, 15 mol %), triphenylphosphine (23 mg, 15 mol %), bis(triphenylphosphine)palladium(II) chloride (41 mg, 10 mol %), triethylamine (0.33 mL, 2.3 mmol) and DMF (3 mL) was degassed with a nitrogen then heated under microwave irradiation (120° C./15 min). The cooled mixture was poured into water (30 mL) and extracted with ethyl acetate (3×25 mL). The combined organic extracts were washed with brine (2×50 mL), dried over sodium sulfate and evaporated. Chromatography (12 g silica cartridge, 0-80% ethyl acetate/petroleum benzine 40-60° C.) gave the title compound (I42) (311 mg, 86% yield) as a brown oil; 1H NMR (400 MHz, CDCl3) δ 8.57 (s, 1H), 7.73-7.65 (m, 2H), 7.46-7.28 (m), 7.15-7.08 (m), 4.25 (s, 2H), 3.95 (s, J=9.6 Hz, 2H), 3.70 (s, 3H), 2.80 (t, J=12.1 Hz, 2H), 2.70-2.59 (m, 3H), 1.84 (d, J=12.9 Hz, 2H), 1.65 (td, J=12.8, 4.1 Hz, 2H), 1.49 (s, 9H), 1.25 (t, J=7.6 Hz, 3H). LCMS: rt 7.01 min; m/z 623.1 [M+H]+, 567.1 [M-tBu+2H]+, 523.1 [M-Boc+2H]+; m/z 621.2 [M−H]−.

Provenance & Evidence