characterised by NMR, HRMS, elemental analysis and X-ray crystallography for complex 3b. These complexes were applied to Sonogashiracross-coupling reactions between aryl bromides and phenylacetylene in DMF at 80 °C. All palladium complexes were stable and showed high catalytic activity in Sonogashira reactions at low catalyst loading and ambient reaction conditions.
Synthesis and catalytic applications of palladium N-heterocyclic carbene complexes as efficient pre-catalysts for Suzuki–Miyaura and Sonogashira coupling reactions
excellent catalytic activities as compared to 2a–c, 3a–c, and the well-known systems for the palladium-catalysed Sonogashira reaction. The reactivity of 4a–c in these preliminary Sonogashira coupling tests seems to be higher than that of previously reported catalyticsystems based on Pd(NHC) moieties. These new palladium NHC complexes are among the first reported palladium catalysts that are efficient for
Palladium-catalyzed decarboxylative cross-coupling of alkynyl carboxylic acids with arylboronic acids
作者:Chao Feng、Teck-Peng Loh
DOI:10.1039/c0cc00403k
日期:——
A highly efficient and mild palladium-catalyzed decarboxylative cross-coupling of aryl boronic acids and alkynyl carboxylic acids for the synthesis of unsymmetrical substituted alkynes is described for the first time.
首次描述了一种高效,温和的钯催化的芳基硼酸和炔基羧酸的脱羧交叉偶联反应,用于合成不对称取代的炔烃。
A copper- and amine-free Sonogashira reaction employing chlorophosphine as new and efficient ligand
作者:Wen Peng Mai、Jin Wei Yuan、Zhi Cheng Li、Gang Chun Sun
DOI:10.1016/j.cclet.2011.11.007
日期:2012.2
An efficient palladium-catalyzed copper- and amine-free Sonogashiracoupling reaction of aryl bromides and chlorides was studied using a sterically hindered monooxychlorophosphine as new ligand. The use of 2 mol% Pd(OAc)2 in the presence of K2CO3 allows the coupling reaction to proceed at mild condition with good to excellent yields.
使用空间受阻的单氧氯膦作为新的配体,研究了芳基溴化物和氯化物的高效钯催化的无铜和无胺的Sonogashira偶联反应。在K 2 CO 3存在下使用2mol%的Pd(OAc)2可使偶联反应在温和的条件下以良好或优异的产率进行。
A Merrifield resin supported Pd–NHC complex with a spacer(Pd–NHC@SP–PS) for the Sonogashira coupling reaction under copper- and solvent-free conditions
作者:Sanjay N. Jadhav、Arjun S. Kumbhar、Sawanta S. Mali、Chang Kook Hong、Rajashri S. Salunkhe
DOI:10.1039/c4nj02025a
日期:——
Synthetic applications of a polymer supported air-stable palladium NHC complex with a spacer (catalyst 6, Pd–NHC@SP–PS) and without a spacer (catalyst 7, Pd–NHC@PS) have been studied for the Sonogashira cross-coupling reaction. The catalysts were prepared by immobilizing pre-formed IL on the polymer and reacting the resultant modified polymer with Pd(OAc)2 in THF at 60 °C. Both the catalysts were characterized