[CH2:1]([O:3][C:4](=[O:16])[CH:5]([CH2:8][C:9]1[CH:14]=[CH:13][C:12]([NH2:15])=[CH:11][CH:10]=1)[CH2:6][CH3:7])[CH3:2].C(N(CC)CC)C.[Cl:24][C:25]1[CH:33]=[CH:32][C:28]([C:29](Cl)=[O:30])=[CH:27][CH:26]=1>C1COCC1>[CH2:1]([O:3][C:4](=[O:16])[CH:5]([CH2:8][C:9]1[CH:10]=[CH:11][C:12]([NH:15][C:29](=[O:30])[C:28]2[CH:32]=[CH:33][C:25]([Cl:24])=[CH:26][CH:27]=2)=[CH:13][CH:14]=1)[CH2:6][CH3:7])[CH3:2]A solution of ethyl-2-(p-aminobenzyl)-butyrate (3.3 g) and triethylamine (1.5 g) in anhydrous THF (70 ml) is slowly (10 minutes) addioned with a solution of p-chlorobenzoylchloride (2.6 g) in 30 ml of anhydrous THF. It is stirred for an hour at room temperature, then filtered and the solution as obtained is vacuum evaporated. The obtained solid residue is crystallized from methanol providing 4 g amide with m.p. 119°-120° C. Analysis:
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