In a study of the dehalogenation of propargylic bromides it was reported3 that such halides react with lithium aluminum hydride and yield a mixture of acetylenic and allenic hydrocarbons. Thus, 1-bromoheptyne-2, C4Hs-kC-CH2Br (I), formed a mixture of heptyne-2 and heptadiene-l, 2. The bromide I was prepared4 from the corresponding alcohol using phosphorus tribromide in the presence of a catalytic amount of pyridine. It was purified by ...
