E-BENZOYLAMINO-a-CHLOROCAPROIC

After drying under reduced pressure, the crude, crystalline s-benzoylamino-a-chlorocaproic acid weighs 39.1-43.1 g. (72-80%) and melts at 138-140°. The product is dissolved in 320 ml. of hot 95% ethanol, 480 ml. of boiling water is added, and the resulting solution is allowed to cool slowly. The crystals are collected, washed with cold water, and dried, affording 26.1-28.2 g. (48-52%) of pure e-benzoylamino-a-chlorocaproic acid, m.p. 143-144° (Note 7). 

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