CO[C:3](=[O:13])[C:4]1[CH:9]=[CH:8][C:7]([Cl:10])=[CH:6][C:5]=1[CH2:11]Br.[CH2:14]([NH2:21])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.C([O-])([O-])=O.[K+].[K+].C(OCC)(=O)C>C1(C)C=CC=CC=1.CCCCCC>[CH2:14]([N:21]1[CH2:11][C:5]2[C:4](=[CH:9][CH:8]=[C:7]([Cl:10])[CH:6]=2)[C:3]1=[O:13])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1A mixture of 2-bromomethyl-4-chloro-benzoic acid methyl ester (0.120 g, 0.46 mmol), benzylamine (0.106 mL, 1.0 mmol), and K2CO3 (0.207 g, 1.5 mmol) in toluene (5 mL) was heated with stirring at 100° C. for 2 h. Workup and silica gel column chromatography using 30% ethyl acetate in hexane afforded 2-benzyl-5-chloro-2,3-dihydro-isoindol-1-one (0.047 g, 40%). 1H NMR (300 MHz, CDCl3): δ (ppm) 4.26 (m, 2H), 4.80 (m, 2H), 7.32 (m, 7H), 7.83 (m, 1H). GC-MS: m/z 257 (M)+, 180 (M−77)+.
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