[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([N:15]2[CH2:19][CH:18]([CH2:20]O)[CH2:17][C:16]2=[O:22])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.S(Cl)([Cl:25])=O>C1(C)C=CC=CC=1>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([N:15]2[CH2:19][CH:18]([CH2:20][Cl:25])[CH2:17][C:16]2=[O:22])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1740 mg (2.49 mmol) (RS)-1-(4-benzyloxy-phenyl)-4-hydroxymethyl-pyrrolidin-2-one is dissolved in 20 ml toluene. 1.08 ml (14.9 mmol) thionyl chloride is added and the mixture refluxed for 6 hours. Evaporation and chromatography (silica gel, n-hexane/ethyl acetate 1:1) yields 123 mg (16%) of a brownish semisolid. MS: m/e=315.2 (M+).
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