The preparation of trialkylvinylborates and their reactions with oxiranes and with iodine. A facile synthesis of 1,4-alkanediols and 1-alkenes
作者:K. Utimoto、K. Uchida、M. Yamaya、H. Nozaki
DOI:10.1016/0040-4020(77)80381-5
日期:1977.1
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