反应详情

温度

110 °C

1-Methyl-piperazine (210 uL, 1.9 mmol) was added to a mixture of methyl 2-amino-4-chloroquinazoline-7-carboxylate (300 mg, 1 mmol) in ethanol (3 mL) and triethylamine (350 μL, 2.5 mmol). The mixture was heated in an oil bath at 110° C. for 1 h. The reaction mixture was concentrated to remove the ethanol and was partitioned between water and EtOAc. The organic phase was washed with saturated NaCl aqueous solution, dried over MgSO4, filtered, and concentrated to give the crude product, (190 mg, 50%) as an off white amorphous solid. 1H NMR (300 MHz, DMSO) δ 2.23 (s, 3H), 3.56 (m, 4H), 3.86 (s, 3H), 3.90 (m, 4H), 6.53 (b, 2H), 7.50 (d, 1H), 7.80 (m, 2H); Analytic LCMS (M+H)+: m/z=302.1.

1. concentrationThe reaction mixture was concentrated
2. customto remove the ethanol
3. customwas partitioned between water and EtOAc
4. washThe organic phase was washed with saturated NaCl aqueous solution
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated