Reactions of 3-alkyl- and 3,3-dialkyl-1-bromoallenes with organocuprates: Effects of the nature of the cuprate reagent on the regio- and stereoselectivity
作者:Anna Maria Caporusso、Carmela Polizzi、Luciano Lardicci
DOI:10.1016/s0040-4039(00)96867-9
日期:1987.1
Organocuprates induce 1,3- and direct substitution in 3-alkyl- and 3,3-dialkyl-1-bromo-1,2-dienes leading respectively to either terminal acetylenes or allenic hydrocarbons. The nature of the cuprate exerts a prominent role in determining both the regio- and the stereochemistry of these reactions.
Several homoallenyl radicals have been generated by the reaction of the corresponding iodides with Bu3SnH and found to produce small amounts of vinylcyclopropanes in addition to allene hydrocarbons establishing that homoallenyl radicals cyclize to isomeric 1-cyclopropylvinyl radicals.