Novel cross-coupling reactions between organotellurides and Grignard reagents employing a MnCl2/CuI catalytic system
作者:Marcio S. Silva、Renan S. Ferrarini、Bruno A. Sousa、Fabiano T. Toledo、João V. Comasseto、Rogério A. Gariani
DOI:10.1016/j.tetlet.2012.04.134
日期:2012.7
We present a general protocol for the cross-coupling reaction of Grignardreagents and organic tellurides. Aryl Grignardreagents react stereospecifically with vinyl tellurides in the presence of a catalytic amount of manganese (II) chloride and copper (I) iodide to produce good yields of the corresponding cross-coupling products.
Diastereoselective synthesis of α,β-unsaturated systems
作者:Priscila Castelani、João V. Comasseto
DOI:10.1016/j.tet.2005.01.025
日期:2005.2
Functionalized Z-vinylic tellurides were used in substitution reactions with lower order cyanocuprates leading to alpha, beta-unsaturated ketones and esters in good yields. In the case of acyclic tellurides, the product was obtained in high diastereoselectivity. The control of the stereoselectivity was achieved by simple change of the reaction temperature. (C) 2005 Elsevier Ltd. All rights reserved.
The coupling of butylvinyltellurides with organometallic reagents catalysed by nickel complexes
作者:Cristiano Raminelli、João Gargalaka、Cláudio C. Silveira、João V. Comasseto
DOI:10.1016/j.tet.2007.06.057
日期:2007.9
Vinylic tellurides couple efficiently with sp, sp(2) and sp(3) hybridised organometallic compounds (Li, MgX and Zn species) in the presence of dichloro-bis( triphenylphosphine) nickel(II) as catalyst. (c) 2007 Elsevier Ltd. All rights reserved.
Coupling of butyl vinyl tellurides with metal acetylides catalyzed by nickel complexes
作者:Cristiano Raminelli、João Gargalaka、Cláudio C. Silveira、João V. Comasseto
DOI:10.1016/j.tetlet.2004.04.120
日期:2004.6
Z-Vinylic tellurides react with metal acetylides under nickel complexes catalysis to give Z-enynes and Z-enediynes in good yields. (C) 2004 Elsevier Ltd. All rights reserved.
Coupling of Z-vinylic tellurides with alkynes catalysed by : synthesis of Z-enynes and Z-enediynes
作者:Gilson Zeni、João V. Comasseto
DOI:10.1016/s0040-4039(99)00773-x
日期:1999.6
Vinylic tellurides of the Z-configuration couple with alkynes under PdCl2/CuI catalysis to give enynes and enediynes in good yields and with retention of the double bond configuration. (C) 1999 Elsevier Science Ltd. All rights reserved.