Rhodium-Catalysed Alkoxycarbonylative Cyclisation Reactions of 1,6-Enynes
作者:Fırat Ziyanak、Melih Kuş、Levent Artok
DOI:10.1002/adsc.201000772
日期:2011.4.18
The rhodium‐catalysedcarbonylation of 1,6‐enynes possessing an electron‐deficient alkenyl moiety in an alcohol reagent in the presence of a rhodiumcomplex proceeded stereo‐ and chemoselectively to afford exocyclic α,β‐enoates.
Nickel-mediated carboxylative cyclization of enynes
作者:Masanori Takimoto、Takashi Mizuno、Yoshihiro Sato、Miwako Mori
DOI:10.1016/j.tetlet.2005.05.129
日期:2005.8
Nickel-mediated carboxylative cyclization of alpha,omega-enyne using carbon dioxide was investigated. Oxidative cycloaddition of enynes having an electron withdrawing group on alkene to a zero-valent nickel complex smoothly proceeded to provide nickelacyclopentene intermediates, which regioselectively reacted with CO2 at the Csp(3)-nickel bond, giving cyclized carboxylation products in good yields. (c) 2005 Elsevier Ltd. All rights reserved.