反应详情

A suspension of 6-nitro-3,4-dihydroquinolin-2(1H)-one (1.5 g, 7.80 mmol), 2-chloro-N,N-dimethylethanamine hydrochloride (2.25 g, 15.60 mmol) and potassium carbonate (6.47 g, 46.80 mmol) in 25 mL DMF was stirred at room temperature for 3 days. After this time, the mixture was poured into 20 mL H2O then extracted with 3×150 mL EtOAc. The combined organic fractions were washed with brine, dried over Na2SO4, filtered and concentrated. The residue was subjected to flash chromatography on silica gel using 5% 2M NH3 in MeOH/CH2Cl2 to give a yellow viscous oil (1.5 g, 73.2%). 1H-NMR (CDCl3) δ: 8.14 (dd, J=2.4, 9.0 Hz, 1H), 8.06 (d, J=2.4 Hz, 1H), 7.15 (d, J=9.0 Hz, 1H), 4.09 (t, J=7.5 Hz, 2H), 3.03-2.98 (m, 2H), 2.73-2.68 (m, 2H), 2.51 (t, J=7.5 Hz, 2H), 2.31 (s, 6H).

1. extractionthen extracted with 3×150 mL EtOAc
2. washThe combined organic fractions were washed with brine
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated