反应详情

To a solution of 2-(bromoacetyl)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid, 1,1-dimethylethyl ester (2.12 g., 6 mmole) in dimethylformamide (20 ml.) is added (±)-N-[3-(methylamino)-2-oxo-1-(phenylmethyl)propyl]benzamide (2.0 g., 6 mmole), prepared as set forth in Example 91(b), and diisopropylethylamine (0.77 g., 1.04 ml., 6 mmole). The reaction mixture is stirred overnight, poured into water (50 ml.) and extracted with ethyl acetate (3×50 ml.). The combined ethyl acetate extracts are washed with saturated sodium bicarbonate (twice) and water (twice), dried (Na2SO4), and concentrated into a yellow oily residue (2.9 g.). Flash chromatography (200 g. Merck silica, 2% methanol/chloroform) gives 0.68 g. (S)-2-[[[3-(benzoylamino)-2-oxo-4-phenylbutyl]methylamino]acetyl]-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid, 1,1-dimethylethyl ester as a yellow dried up foam.

1. customprepared
2. extractionextracted with ethyl acetate (3×50 ml.)
3. washThe combined ethyl acetate extracts are washed with saturated sodium bicarbonate (twice) and water (twice),
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated into a yellow oily residue (2.9 g.)
6. customFlash chromatography (200 g. Merck silica, 2% methanol/chloroform) gives 0.68 g
7. dry with material(S)-2-[[[3-(benzoylamino)-2-oxo-4-phenylbutyl]methylamino]acetyl]-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid, 1,1-dimethylethyl ester as a yellow dried up foam