反应详情

To a solution of 30.97 g (0.148 mol) of (4-methoxy-benzylamino)-acetic acid methyl ester in 200 ml of dioxane and 200 ml of H2O, 25 ml (0.178 mol) of triethylamine a solution of 43.9 g (0.163 mol) of 4-(3-chloro-propoxy)-benzenesulfonyl chloride in 100 ml of dioxane is added at 0-5° C. The mixture is allowed to warm to r.t. and stirred for 3 h. The reaction mixture is neutralized with 1N HCl and extracted with AcOEt. The combined extracts are dried over MgSO4 and concentrated under reduced pressure to give {[4-(3-chloro-propoxy)benzenesulfonyl]-(4-methoxy-benzyl)-amino}-acetic acid methyl ester; NMR (CDCl3): 2.25-2.35 (m, 2H), 3.56 (s, 3H), 3.75 (t, 2H, J=6.04 Hz), 3.79 (s, 3H), 3.9 (s, 2H), 4.2 (t, 2H, J=6.04 Hz), 4.39 (s, 2H), 6.84 (d, 2H, J=8.56 Hz), 6.99 (d, 2H, J=9.08 Hz), 7.16 (d, 2H, J=9.08 Hz), 7.83 (d, 2H, J=8.56 Hz).

1. extractionextracted with AcOEt
2. dry with materialThe combined extracts are dried over MgSO4
3. concentrationconcentrated under reduced pressure