[CH2:1]([NH:8][CH2:9][C:10]([OH:12])=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:13]([C:17]1[CH:22]=[CH:21][C:20]([N:23]=[C:24]=[S:25])=[CH:19][CH:18]=1)[CH2:14][CH2:15][CH3:16].C(N(CC)CC)C>C(Cl)(Cl)Cl>[CH2:1]([N:8]1[CH2:9][C:10](=[O:12])[N:23]([C:20]2[CH:21]=[CH:22][C:17]([CH2:13][CH2:14][CH2:15][CH3:16])=[CH:18][CH:19]=2)[C:24]1=[S:25])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1A mixture of N-benzyl glycine (8.7 g), 4-n-butylphenyl-isothiocyanate (8.55 g), triethyl amine (5.5 g) and chloroform (150 mL) was heated at reflux for 5 hours. The solvent was evaporated. The residue was dissolved in ethyl acetate (300 mL) and water (2×200 mL). The organic phase was dried over anhydrous magnesium sulfate and evaporated to dryness. Crystallization from ethyl acetate afforded the title compound (11.4 g) as an off-white solid, m.p. 149°-151° C. Anal. Calcd. for. C20H22N2O S: C, 70.97; H, 6.55; N, 8.28. Found: C, 70.81; H, 6.76; N, 8.32. Mass spectrum (EI, M.+) m/z 338.
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