Synthesis and stereochemistry of tetra-o-tolylethene and 1,1,2,2-tetra-o-tolylethane
作者:Rudolph Willem、Henri Pepermans、Klaas Hallenga、Marcel Gielen、Rudy Dams、Herman J. Geise
DOI:10.1021/jo00159a021
日期:1983.6
WILLEM, R.;PEPERMANS, H.;HALLENGA, K.;GIELEN, M.;DAMS, R.;GEISE, H. J., J. ORG. CHEM., 1983, 48, N 11, 1890-1898
作者:WILLEM, R.、PEPERMANS, H.、HALLENGA, K.、GIELEN, M.、DAMS, R.、GEISE, H. J.
DOI:——
日期:——
Synthesis of Sterically Hindered Ortho-Substituted Tetraphenylethenes. Electronic Effects in the McMurry Olefination Reaction
作者:Mee-Kyung Chung、Guizhong Qi、Jeffrey M. Stryker
DOI:10.1021/ol060318h
日期:2006.3.1
[reaction: see text] Contrary to literature consensus, the McMurry olefination reaction can be extended to the direct synthesis of sterically encumbered tetrakis(2-substituted) tetraphenylethenes from the corresponding 2,2'-disubstitutedbenzophenones. The reaction exploits previously unrecognized substrate-based electronic effects that dominate over otherwise controlling steric considerations and