[CH2:1]([CH2:4][NH:5][C:6]([CH3:10])([CH3:9])[CH2:7][NH2:8])[CH:2]=[CH2:3].[Cl:11][C:12]1[CH:13]=[C:14]([CH:18]=[CH:19][C:20]=1[Cl:21])[C:15](Cl)=[O:16]>C1C=CC=CC=1.C(OCC)(=O)C>[Cl:11][C:12]1[CH:13]=[C:14]([CH:18]=[CH:19][C:20]=1[Cl:21])[C:15]([NH:8][CH2:7][C:6]([NH:5][CH2:4][CH2:1][CH:2]=[CH2:3])([CH3:10])[CH3:9])=[O:16]A mixture of 2-allylmethylamino-2-methylpropylamine (1.3 g.,) and 3,4-dichlorobenzoyl chloride (3.15 g.,) was heated under reflux in dry benzene (150 ml.) for 1 hrs. The cooled mixture was washed with dilute sodium hydroxide solution (2 × 30 ml.), water (2 × 30 ml.), dried (MgSO4) and the solvent was removed in vacuo to give a yellow oil (3.9 g.). The oil was passed through a column of alumina 40 × 2.5 cm. using ethyl acetate as an eluent to give 3,4-dichloro-N-(2-allylmethylamino-2-methylpropyl)-benzamide as a pale yellow liquid (2.25 g., 71%).
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