Water → 3-chloro-1-ethoxycarbonylmethyl-2,3,4,5-tetrahydro-1H-[1]benzazepin-2-one

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Reaction Steps

A solution of 3-chloro-2,3,4,5-tetrahydro-1H-[1]benzazepine-2-one (1.95 g) in dimethylformamide (10 ml) was added dropwise with stirring to a solution of potassium t-butoxide (1.12 g) in dimethylformamide (10 ml) at 5°. The solution was stirred for an additional 15 minutes at 5°, then ethyl bromoacetate (1.78 g) in dimethylformamide (5 ml) was added dropwise. Stirring was continued for an additional 30 minutes at 5° and then for 3 hours at room temperature. The reaction mixture was cooled to 10° and water (100 ml) was added. The solution was extracted with chloroform (100 ml) and the chloroform solution washed with water (2×10 ml) and dried over sodium sulfate. The solvent was removed under reduced pressure to yield 3-chloro-1-ethoxycarbonylmethyl-2,3,4,5-tetrahydro-1H-[1]benzazepin-2-one; NMR(DMSO-d6): δ1.2(t,3H); 2.65(m,4H); 4.15(q,2H); 2.6 (d,2H); 7.3(m).

Provenance & Evidence