Cl[C:2]([Cl:12])=[CH:3][C:4]([CH2:10][CH3:11])([CH3:9])[CH2:5][CH2:6][CH2:7][CH3:8].[C:13]1([O-:19])[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.[Na+]>CN(C)C=O.C(Cl)Cl>[Cl:12][CH:2]=[C:3]([O:19][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)[C:4]([CH2:10][CH3:11])([CH3:9])[CH2:5][CH2:6][CH2:7][CH3:8]626 g (3 moles) of 1,1-dichloro-3-ethyl-3-methyl-1-heptene and 676 g (6 moles) of sodium phenolate are heated under relfux in 3 l of dimethylformamide for 16 hours. The mixture is diluted with methylene chloride and extracted by shaking several times with 2N aqueous sodium hydroxide solution. After drying and evaporating on a rotary evaporator, 666 g of crude product remain. Distillation at boiling point0.1 100°-110° C. gives 523 g (65% of theory) of 1-chloro-3-ethyl-3-methyl-2-phenoxy-hept-1-ene.
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