作者:Takiaki Mitsudo、William Fischetti、Richard F. Heck
DOI:10.1021/jo00183a029
日期:1984.5
Cobalt-Catalyzed 1,4-Hydrovinylation of Styrenes and 1-Aryl-1,3-butadienes
作者:Gerhard Hilt、Michael Danz、Jonas Treutwein
DOI:10.1021/ol901064p
日期:2009.8.6
The application of aryl-substituted starting materials such as styrene and 1-aryl-substituted 1,3-butadiene derivatives in the cobalt-catalyzed 1,4-hydrovinylation reaction has been investigated. The use of unsymmetrical alpha,omega-dienes in the hydrovinylation with 1-aryl-1,3-butadiene led chemoselectively to the 1:1 or the 1:2 adducts depending on the stoichiometry of the starting materials.
Catalytic Formal [4 + 2] Cycloadditions between Unactivated Allenes and <i>N</i>-Hydroxyaniline Catalyzed by AuCl<sub>3</sub>/CuCl<sub>2</sub>/O<sub>2</sub>
作者:Jian-Ming Chen、Chin-Jung Chang、Yao-Jin Ke、Rai-Shung Liu
DOI:10.1021/jo500009x
日期:2014.5.16
AuCl3-catalyzed formal [4 + 2]-cycloadditions betweensubstituted allenes and N-hydroxyanilines are described. This reaction sequence comprises initial isomerizations of allenes to butadienes under N2 and subsequent oxidations of N-hydroxyanilines to nitrosoarenes under O2. CuCl2 (5 mol %) was added in the second step to increase the oxidation efficiency. The reactions are compatible with various 1,1-di- and
Herein, we report an effective method to offer chiral gem-difluorinated cyclopropanes containing an all-carbonquaternarystereocenter by rhodium-catalyzed stereoablative kinetic resolution. The activation of a sterically hindered all-carbonquaternary C–C bond through oxidative addition with a chiral rhodium complex is proposed as the enantiodetermining step. A wide range of gem-difluorinated cyclopropanes