反应详情

Another multi-step synthesis of ethers started with the reaction of a commercially available alkylene diol, e.g., 1,6-pentanediol, with an alkyl or aralkyl halide, e.g., phenylmethyl bromide, in the presence of potassium hydroxide in xylene solvent, yielding 7-phenyl-6-oxaheptan-1-ol (XVI). Oxidation of (XVI) with pyridinium chlorochromate produced the corresponding aldehyde, 7-phenyl-6-oxaheptanal (XVII). Reaction of (XVII) with dibromodifluoromethane, triphenylphosphine, and powdered zinc in dimethylacetamide provided 6,6-difluoro-5-hexenyl phenylmethyl ether (XVIII). This synthesis is detailed in Example 11.