2,4-Dichlorobenzyl chloride → HCID 13232345, compound

Participants

Reaction Steps

118 g of 2,4-dichlorobenzyl chloride were added dropwise to 14.6 g of magnesium turnings in 400 ml of dry diethyl ether at the boiling point. After the reaction was complete, a solution of 77.3 g of 4-chloroacetophenone in 400 ml of dry diethyl ether was added. Thereafter, decomposition was effected with aqueous ammonium chloride solution, the organic phase was separated off, washed neutral, dried over sodium sulfate and evaporated down under reduced pressure, the residue was taken up in 1 liter of toluene and the solution was refluxed with 4 g of 4-methylbenzenesulfonic acid, in a water separator. After dehydration was compelete, the toluene phase was washed with sodium carbonate solution and water and dried over sodium sulfate, the solvent was evaproated off and the residue was recrystallized from methanol to give 107 g (81.9%) of E-1-(2,4-dichlorophenyl)-2-(4-chlorophenyl)-prop-1-ene of melting point 84°-85° C.

Provenance & Evidence