Synthesis of
<scp>
<i>N</i>
‐Heterocyclic
</scp>
Carbine Silver(I) and Palladium(
<scp>II</scp>
) Complexes with Acylated Piperazine Linker and Catalytic Activity in Three Types of C—C Coupling Reactions
salts LH2·Cl2 and LH2·(PF6)2 with acylated piperazine linker and two N‐heterocycliccarbene (NHC) silver(I) and palladium(II) complexes [L2Ag2](PF6)2 (1) and [L2Pd2Cl4] (2) were prepared. The crystal structures of LH2·Cl2 and 1 were confirmed by X‐ray analysis. In 1, one 26‐membered macrometallocycle was generated through two silver(I) ions and two bidentate ligands L. The catalytic activity of 2 was
Palladium anchored on amine-functionalized K10 as an efficient, heterogeneous and reusable catalyst for carbonylative Sonogashira reaction
作者:Sujit P. Chavan、G.Bishwa Bidita Varadwaj、Kulamani Parida、Bhalchandra M. Bhanage
DOI:10.1016/j.apcata.2015.09.019
日期:2015.10
immobilization of palladium chloride (II) on the amine functionalized K10 support and its application toward the carbonylative Sonogashirareactions. The various catalyst characterization techniques revealed the successful grafting of APTES moiety on the K10 clay surface through covalent bonding and Pd with the NH2 groups of [email protected] through co-ordinate bonding. The immobilized catalyst was successively
NHC–palladium(II) complex [Pd(μ–OH)Cl(IPr)}2] (IPr = bis(2,6-diisopropylphenyl)imidazolin-2-ylidene) catalyzes the oxidativecoupling of a broad spectrum of aryl- and alkenylboronic acids at loadings down to 5 ppm. At the concentration of 0.05 mol% the catalyst permits an efficientreactionunderbase-freeconditions.
Palladium-Catalyzed Multialkynyl Cross-Coupling Reactions with Tetraalkynylindates
作者:Dongjin Kang、Dahan Eom、Hyunseok Kim、Phil Ho Lee
DOI:10.1002/ejoc.201000027
日期:2010.4
Pd-catalyzed multialkynylcross-couplingreaction performed with tetraalkynylindates generated in situ from the reaction of 1 equiv. of indium trichloride with 4 equiv. of organometallic reagents has been developed to produce symmetric as well as unsymmetric multialkynyl-substituted aromatic compounds in good-to-excellent yields. In these reactions, the four acetylide groups in the tetraalkynylindates transferred