反应详情

To a suspension of 2-chloro-7-fluoroquinoline-3-carbaldehyde (44.7 g, 213 mmol) in THF (600 mL) was treated with MeMgBr (78 mL, 1.1 eq) dropwise at −20° C. After overnight, the reaction was quenched with NH4Cl solution and extracted with Ether (300 mL and 100 mL). The organics were washed with water, brine, dried over Na2SO4, concentrated and recrystallized from EtOAc (100 mL) and hexane (1 L). A pale yellow solid was obtained (41 g, 85%). 1H NMR (400 MHz, CDCl3) δ ppm 8.41 (s, 1H), 7.87 (dd, J=8.0, 4.0 Hz, 1H), 7.67 (dd, J=8.0, 2.0 Hz, 1H), 7.38 (td, J=8.0, 2.0 Hz, 1H), 5.38 (q, J=4.0 Hz, 1H), 1.63 (d, J=4.0 Hz, 3H). Mass Spectrum (ESI) m/e=226 (M+1).

1. customthe reaction was quenched with NH4Cl solution
2. extractionextracted with Ether (300 mL and 100 mL)
3. washThe organics were washed with water, brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated
6. customrecrystallized from EtOAc (100 mL) and hexane (1 L)
7. customA pale yellow solid was obtained (41 g, 85%)