2,4-Dichlorobenzyl chloride → Methyl 2,4-dichloro-alpha-phenylbenzenepropanoate

Beteiligte Stoffe

Reaktionsschritte

A mixture of 30 parts of methyl benzeneacetate, 6.8 parts of sodium hydride dispersion 78%, 135 parts of N,N-dimethylformamide and 180 parts of benzene is stirred for 1 hour at room temperature, while nitrogen gas is introduced. Another 90 parts of benzene is added. Then there is added dropwise, during a 30 minutes-period, a solution of 43.4 parts of 1,3-dichloro-4-(chloromethyl)benzene in 45 parts of N,N-dimethylformamide. Upon completion, stirring is continued for 30 minutes at room temperature. The reaction mixture is poured onto water and the product is extracted twice with 2,2'-oxybispropane. The combined extracts are washed with water, dried, filtered and evaporated. The residue is distilled, yielding 26.5 parts of methyl 2,4-dichloro-α-phenylbenzenepropanoate; bp. 140°-145° C at 0.05 mm. pressure.

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