Carbon tetrabromide → 4-(2-Chlorobenzyloxy)-3,5-dichloro-1-(3,3-dibromo-2-propenyloxy)benzene

Participants

Reaction Steps

In a reaction vessel were placed 0.26 g of zinc dust, 1.0 g of triphenylphosphine, 1.3 g of carbon tetrabromide and 20 ml of methylene chloride, followed by stirring at room temperature. After 24 hours, a solution of 0.70 g of (4-(2-chlorobenzyloxy)-3,5-dichlorophenoxy)acetaldehyde dissolved in 5 ml of methylene chloride was added dropwise to the above solution, while stirring at room temperature. After stirring at room temperature for 6 hours, the reaction mixture was concentrated to obtain a residue. The residue was subjected to silica gel chromatography, which afforded 0.63 g of 4-(2-chlorobenzyloxy)-3,5-dichloro-1-(3,3-dibromo-2-propenyloxy)benzene (63% yield), m.p. 83.5° C.

Provenance & Evidence