Triethylamine → 2-chloro-N-(3-chloro-4-fluorophenyl)-6-(3-(dimethylamino)prop-1-ynyl)quinazolin-4-amine

Participants

Reaction Steps

In a 50 mL round-bottomed flask was added 2-chloro-N-(3-chloro-4-fluorophenyl)-6-iodoquinazolin-4-amine (200 mg, 0.46 mmol), N,N-dimethylpropargylamine (99 mL, 0.92 mmol), NEt3 (0.26 mL, 1.84 mmol), CuI (0.88 mg, 4.6 mmol) and PdCl2(PPh3)2 (6.5 mg, 9.2 mmol) in DMF (3 mL) to give a light yellow suspension. The mixture was stirred at room temperature overnight under an argon atmosphere. The reaction mixture was diluted with water (10 mL) and ethyl acetate (10 mL) and then a precipitate formed. The resulting precipitate was removed by filtration through Celite. The filtrate was extracted with ethyl acetate (2×10 mL). The combined organic layer was washed with water (1×15 mL) and brine (1×15 mL) and was dried over Na2SO4, filtered and concentrated. The residue was purified by column chromatography on silica gel (eluted with CH2Cl2/MeOH 1:0 to 9:1). The desired product was washed with CH2Cl2 to give 61 mg of 2-chloro-N-(3-chloro-4-fluorophenyl)-6-(3-(dimethylamino)prop-1-ynyl)quinazolin-4-amine, as pale yellow solid in a 34% yield. LCMS m/z=389 (M+1) (Method C) (retention time=2.2.4 min). 1H NMR (300 MHz, DMSO) δ 10.30 (s, 1H), 8.68 (s, 1H), 8.07 (dd, J=2.7, 6.9 Hz, 1H), 7.86 (dd, J=1.8, 8.7 Hz, 1H), 7.81-7.70 (m, 1H), 7.68 (d, J=8.4 Hz, 1H), 7.49 (t, J=9.2 Hz, 1H), 3.52 (s, 2H), 2.28 (s, 6H).

Provenance & Evidence