Catalyst shuttling enabled by a thermoresponsive polymeric ligand: facilitating efficient cross-couplings with continuously recyclable ppm levels of palladium
作者:Erfei Wang、Mao Chen
DOI:10.1039/c9sc02171j
日期:——
A polymeric monophosphine ligand WePhos has been synthesized and complexed with palladium(II) acetate [Pd(OAc)2] to generate a thermoresponsive pre-catalyst that can shuttle between water and organic phases, with the change being regulated by temperature. The structure of the polymeric ligand was confirmed with matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry
Very Fast, Ligand-Free and Aerobic Protocol for the Synthesis of 4-Aryl-Substituted Triphenylamine Derivatives
作者:Chun Liu、Qijian Ni、Jieshan Qiu
DOI:10.1002/ejoc.201100072
日期:2011.6
A fast, convenient and ligand-free protocol for the synthesis of a series of 4-aryl-substituted triphenylamine derivatives by a palladium-catalysed aerobic Suzuki reaction of aryl halides with [4-(diphenylamino)phenyl]boronic acid in aqueous iPrOH is described. Importantly, both aryl bromides and heteroaryl halides afforded good to excellent yields under mild conditions.
Highly efficient electroluminescent Pt<sup>II</sup> ppy-type complexes with monodentate ligands
作者:Jiang Zhao、Feifan Dang、Zhao Feng、Boao Liu、Xiaolong Yang、Yong Wu、Guijiang Zhou、Zhaoxin Wu、Wai-Yeung Wong
DOI:10.1039/c7cc03251j
日期:——
Functional Pt(II) ppy-type complexes (ppy = 2-phenylpyridine anion) with pyridine and chloride monodentate ligands are prepared, which show high electroluminescent efficiencies.
Iridium(<scp>iii</scp>) complexes with the dithieno[3,2-<i>b</i>:2′,3′-<i>d</i>]phosphole oxide group and their high optical power limiting performances
New cyclometalated iridium(iii) complexes with the dithieno[3,2-b:2′,3′-d]phosphole oxide group can show a higher optical power limiting ability than C60 for a 532 nm laser.
A highly efficient and aerobic protocol for the synthesis of N-heteroaryl substituted 9-arylcarbazolyl derivatives via a palladium-catalyzed ligand-free Suzuki reaction
作者:Xiaofeng Rao、Chun Liu、Jieshan Qiu、Zilin Jin
DOI:10.1039/c2ob26119g
日期:——
A palladium-catalyzed aerobic and ligand-free Suzuki reaction in aqueous ethanol has been developed for the synthesis of N-heteroaryl substituted 9-arylcarbazolyl derivatives. A number of N-heteroaryl halides, namely 2-halogenated pyridines, 2-bromoquinoline, 5-bromopyrimidine and 2-chloropyrazine, were coupled with 4-(9H-carbazol-9-yl)phenylboronic acid (CPBA) or 9-phenyl-9H-carbazol-3-ylboronic acid