Highly unsaturated conjugated systems from vinylic tellurides
作者:Rafael E. Barrientos-Astigarraga、Denilson N. Moraes、Joa˜o V. Comasseto
DOI:10.1016/s0040-4039(98)02352-1
日期:1999.1
1,4 addition of higherorder Z vinyl cuprates to enones followed by triflate trapping results in the corresponding enol triflates, which can be coupled with terminal alkynes or with Z vinyl zinc chloride under Pd0 catalysis.
Z-Vinylic higherordercyanocuprates, prepared from the corresponding Z-vinylic tellurides, react efficiently with hindered enones in or in diethyl ether. In neat THF the hindered enones fail to react with Z-vinyl cyanocuprates prepared in this way.
作者:Juliana M. Oliveira、Gilson Zeni、Ivani Malvestiti、Paulo H. Menezes
DOI:10.1016/j.tetlet.2006.08.130
日期:2006.11
The totalsynthesis of 1-(Z)-atractylodinol, a natural polyacetylenic alcohol with several biological activities, has been achieved using a newly developed telluride synthon and a novel use for the Negishi type coupling reaction employing vinyltellurides.