反应详情

温度

45 °C

To a solution of 8-bromo-2-chloroquinazoline (7.3 g, 30 mmol) in acetonitrile (150 mL) was added trans-4-aminocyclohexanol (6.9 g, 60 mmol) to form a suspension. DBU (9.1 g, 60 mmol) was added. The reaction mixture was stirred at 45° C. overnight. A light yellow suspension was formed. The solvent was removed under reduced pressure, and the residue was taken into DCM (100 mL) and washed with water (100 mL). The organic layer was dried over Na2SO4 and purified by chromatography (eluting with DCM) to give the title compound as a light yellow solid (3.36 g, 35%). 1HNMR (DMSO-d6, 400 MHz): δ 9.10 (s, 1H), 8.02 (dd, J=1.2, 7.6 Hz, 1H), 7.81 (dd, J=1.2, 7.6 Hz, 1H), 7.62-7.60 (m, 1H), 7.12 (dd, J=7.6, 7.6 Hz, 1H), 4.62-4.60 (m, 1H), 3.85-3.82 (m, 1H), 2.05-2.02 (m, 2H), 1.89-1.86 (m, 2H), 1.36-1.26 (m, 4H).

1. customto form a suspension
2. customA light yellow suspension was formed
3. customThe solvent was removed under reduced pressure
4. washwashed with water (100 mL)
5. dry with materialThe organic layer was dried over Na2SO4
6. custompurified by chromatography (eluting with DCM)