Nickel-mediated cyclization of enynes under an atmosphere of carbon dioxide
作者:Masanori Takimoto、Takashi Mizuno、Miwako Mori、Yoshihiro Sato
DOI:10.1016/j.tet.2006.03.121
日期:2006.8
Nickel-mediated carboxylation of α,ω-enyne was investigated. In the presence of a stoichiometric amount of zero-valent nickel complex, enynes having an electron-withdrawing group on alkene reacted with carbon dioxide via intramolecular cyclization to afford cyclic carboxylic acids in good yields. Various heterocyclic compounds were prepared by this carboxylative cyclization protocol. The reaction seems