Evidences of release and catch mechanism in the Heck reaction catalyzed by palladium immobilized on highly cross-linked-supported imidazolium salts
作者:Cinzia Pavia、Francesco Giacalone、Lucia Anna Bivona、Anna Maria Pia Salvo、Chiara Petrucci、Giacomo Strappaveccia、Luigi Vaccaro、Carmela Aprile、Michelangelo Gruttadauria
DOI:10.1016/j.molcata.2014.02.025
日期:2014.6
Palladium (10 wt%) on a highly cross-linkedimidazolium-basedmaterial was used as catalyst in 0.1 mol% in the Heck reaction between several alkenes and aryl iodides. Products were obtained from good to high yields. Deeper investigations showed a release of Pd species in solution and their capture by the imidazolium-based support. When a sixfold amount of support was employed the re-captured Pd species
[EN] SYNTHESES OF METAL HETEROCYCLIC CARBENE ENOLATES AS COUPLING REACTIONS CATALYSTS<br/>[FR] SYNTHÈSES D'ÉNOLATES ET DE CARBÈNES HÉTÉROCYCLIQUES MÉTALLIQUES COMME CATALYSEURS DE RÉACTIONS DE COUPLAGE
申请人:COSKUN NEJDET
公开号:WO2017099693A1
公开(公告)日:2017-06-15
The invention relates to the synthesis methods of N-heterocyclic carbene NHCE metal complexes and their catalytic activities in carbon-carbon coupling reactions.
Rhodium-Catalyzed Asymmetric Conjugate Addition of Arylboronic Acids to Nitroalkenes Using Olefin–Sulfoxide Ligands
作者:Feng Xue、Dongping Wang、Xincheng Li、Boshun Wan
DOI:10.1021/jo3003562
日期:2012.4.6
An efficient rhodium/olefin–sulfoxide catalyzed asymmetric conjugateaddition of organoboronic acids to a variety of nitroalkenes has been developed, where 2-methoxy-1-naphthyl sulfinyl functionalized olefin ligands have shown to be highly effective and are applicable to a broad scope of aryl, alkyl, and heteroaryl nitroalkenes.
Novel stilbene-based Fischer base analog of leuco-TAM - (2<i>E</i>,2′<i>Z</i>)-{2-(4-(<i>E</i>)-styrylphenyl)propane-1,3-diylidene}bis(1,3,3-trimethylindoline) - derivatives: synthesis and structural consideration by 1D NMR and 2D NMR spectroscopy
作者:Sam-Rok Keum、Hyun-Woo Lim
DOI:10.1002/mrc.4359
日期:2016.2
We report the synthesis of a series of novelstilbene-based (St) Fischerbaseanalogs of leuco-triarylmethane (LTAM) dyes by treating Fischerbase with (E)-4-styrylbenzaldehyde derivatives. All St-LTAM molecules examined herein are characterized by 1D and 2DNMR. They were found to exhibit ZE configuration and isomerize to their diastereomers EE and ZZ in 2-3 h. They exhibit type I behavior of diastereomeric
我们报告了通过处理与(E)-4-苯乙烯基苯甲醛衍生物的菲舍尔碱一系列新的基于二苯乙烯的(St)菲舍尔碱类似物的无色三芳基甲烷(LTAM)染料的合成。本文检查的所有St-LTAM分子均通过1D和2D NMR表征。发现它们表现出ZE构型并在2-3小时内异构化为其非对映异构体EE和ZZ。它们表现出非对映异构化的I型行为。版权所有(c)2015 John Wiley&Sons,Ltd.
Synthesis of vinylated 5,10,15,20-tetraphenylporphyrins via Heck-type coupling reaction and their photophysical properties
作者:Mariette M. Pereira、Guillermo Muller、Juan Ignacio Ordinas、M. Em??lia Azenha、Lu??s G. Arnaut
DOI:10.1039/b203910a
日期:2002.8.27
The direct coupling reaction between substituted olefins and 5,10,15,20-tetrakis(4-bromophenyl)porphyrin, via a Heck-type reaction, constitutes a versatile method for the vinylation of 5,10,15,20-tetrakis(4-bromophenyl)porphyrin to yield new vinylated tetraphenylporphyrins quantitatively. Another strategy for the vinylporphyrin synthesis has been developed. A phosphapalladacycle has been used as catalyst for the coupling reaction between 4-bromoaryl aldehydes and olefins to yield vinyl aldehydes quantitatively. These aldehydes have been condensed with pyrrole, by the one-step nitrobenzene method, to give the corresponding vinylated tetraphenylporphyrins. Photophysical studies of these new porphyrins are also reported.