Carbon tetrabromide → 1-[4-(3,3-Dichloroprop-2-enyloxy)-2,6-dichlorophenoxy]-4-bromobutane

Participants

Reaction Steps

A stirred solution of 22.3 grams (0.062 mole) of 4-[4-(3,3-dichloro-2-propenyloxy)-2,6-dichlorophenoxy]butan-1-ol and 20.6 grams (0.062 mole) of carbon tetrabromide in 250 mL of methylene chloride was cooled to 10° C. and 17.9 grams (0.068 mole) of triphenylphosphine was added in one portion. Upon completion of addition the reaction mixture was warmed to ambient temperature where it stirred during an 18 hour period. After this time the reaction mixture was concentrated under reduced pressure to a residue. The residue was purified with column chromatography on silica gel using 25% methylene chloride in hexane as an eluant. The appropriate fractions were combined and concentrated under reduced pressure, yielding 21.3 grams of the subject compound. The NMR spectrum was consistent with the proposed structure.

Provenance & Evidence