Abstract

Reaction of trialkylboranes with vinyllithium gives non-isolable lithium trialkylvinylborates which react with oxirane and methyloxirane affording 1,4- and 2,5-alkanediols, respectively. Treatment of trialkylboranes with vinylmagnesium bromide produces bromomagnesium trialkylvinylborates which analogously afford alkanediols. Successive treatment of the borates with aqueous alkali and iodine provides 1-alkenes.

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