反应详情

To a mixture of 2-amino-4-chloro-5-nitrophenol (10 g, 0.053 mol) and allyl bromide (5.05 mL, 0.058 mol) in DMF (100 mL) was added K2CO3. The reaction mixture was stirred at room temperature for 3 hours, and then the inorganic salts were filtered off. The filtrate was concentrated, and the residue was dissolved in ethyl acetate and washed with aqueous NH4Cl. The organic layer was dried over MgSO4 and concentrated to provide the desired product (10.9 g, 90%) as yellow solid. MS (DCI/NH3) m/z 246.04 (M+NH4)+; 1H NMR (500 MHz, DMSO-D6) δ ppm 4.68 (d, J=4.99 Hz, 2 H) 5.29 (dd, J=10.60, 1.56 Hz, 1 H) 5.48 (dd, J=17.47, 1.56 Hz, 1 H) 6.05 (m, 1 H) 6.48 (s, 2 H) 6.76 (s, 1 H) 7.59 (s, 1 H).

1. filtrationthe inorganic salts were filtered off
2. concentrationThe filtrate was concentrated
3. dissolutionthe residue was dissolved in ethyl acetate
4. washwashed with aqueous NH4Cl
5. dry with materialThe organic layer was dried over MgSO4
6. concentrationconcentrated