排序方式: 共有48条查询结果,搜索用时 31 毫秒
31.
Jinli Zhang 《Journal of organometallic chemistry》2006,691(6):1301-1306
The Suzuki cross-coupling reaction of 3-pyridylboronic pinacol ester with aryl iodides, bromides and chlorides was carried out in DMF/H2O (3/1, v/v) at 110 °C in the presence of cyclopalladated ferrocenylimine I and K2CO3 or CsCO3 (1.0 equiv.) without the protection of inert gas. By using this method the synthesis of 3-pyridyl biaryl compounds could be readily achieved. 相似文献
32.
The air and moisture stable triphenylphosphine adduct of cyclopalladated ferrocenylimine 2 has been successfully used in palladium-catalyzed Suzuki cross-coupling for the synthesis of ortho-substituted biaryls in air. In the presence of 0.05 mol% of 2 as catalyst and 3 equivalent of CsF as base in dioxane at 100 °C, ortho-substituted biaryls were synthesized with moderate to high yields in the reactions of 2-methoxy-1-naphthylboronic acid with aryl halides, and 14 new ortho-substituted biaryls were obtained and characterized. 相似文献
33.
Junfang Gong 《Journal of organometallic chemistry》2005,690(17):3963-3969
The air and moisture stable tricyclohexylphosphine (PCy3) adducts of dimeric cyclopalladated ferrocenylimines 5 and 6 have been easily synthesized and successfully used in palladium-catalyzed Suzuki cross-coupling of aryl chlorides. Using 0.1 mol% of 6 in the presence of 2 equivalent of Cs2CO3 as base in dioxane at 100 °C provided coupled products in excellent yields in the reaction of non-activated and deactivated aryl chlorides with phenylboronic acid. For activated chlorides such as 4-chloronitrobenzene and 4-chloroacetophenone, the catalyst loadings could be lowered to 0.01 mol% without loss of activity. 相似文献
34.
Concepci n L pez Sonia P rez Xavier Solans Merc Font-Bardia 《Journal of organometallic chemistry》2002,650(1-2):258-267
The study of the reactivity of R---CH=N---(C6H4-2-SMe) with R=C6H5 or 2,4,6-Me3-C6H2 with palladium(II) salts is reported. These studies have allowed us to prepare and characterize the coordination complexes: cis-[Pd{R---CH=N---(C6H4-2-SMe)}Cl2] {R=C6H5 or 2,4,6-Me3-C6H2} and the cyclopalladated compounds [Pd{C6H4---CH=N---(C6H4-2-SMe)}Cl] and [Pd{(2-CH2-4,6-Me2-C6H2)---CH=N---(C6H4-2-SMe)}Cl]. The X-ray crystal structures of the latter complexes reveal that the thioimines act as a [Csp2, phenyl,N,S]− and as a [Csp3, N,S]− terdentate group, respectively. The study of the reactions of the cyclopalladated compounds with PPh3 is also reported. 相似文献
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36.
Synthesis, characterization, and applications in Heck and Suzuki coupling reactions of amphiphilic cyclopalladated ferrocenylimines 总被引:1,自引:0,他引:1
Bing Mu Tiesheng Li Wenjian Xu Guoliang Zeng Pingping Liu Yangjie Wu 《Tetrahedron》2007,63(46):11475-11488
A series of novel amphiphilic ferrocenylimines and their cyclopalladated complexes of general formula [Fe(η5-C5H5)(η5-C5H4CR1NR2)] (R1=H, R2=C12H25-n4a, R1=H, R2=C16H33-n4b, R1=CH3, R2=C12H25-n4c, R1=CH3, R2=C16H33-n4d), [PdCl{[(η5-C5H5)]Fe[(η5-C5H3)CR1NR2]}]2 (5a-d), [PdCl{[(η5-C5H5)]Fe[(η5-C5H3)-CR1NR2]}(PPh3)] (6a-d), were prepared and characterized by 1H NMR, 13C NMR, 31P NMR, IR, HRMS, and elemental analysis. The crystal structures of 5c,d were determined by X-ray crystallography. These amphiphilic cyclopalladated complexes are thermally stable and insensitive to oxygen and moisture. The redox properties of 4a-d, 5a-d, 6a-d were also investigated using cyclic voltammetric technique. Compounds 5a-d, 6a-d displayed good activity in the Heck reaction of a variety of aryl halides with ethyl acrylate or styrene and the Suzuki-Miyaura cross-coupling reaction of aryl bromides with phenylboronic acid in bulk solution. They are also suitable for formation of Langmuir-Blodgett (LB) films. 相似文献
37.
The easily accessible, air- and moisture-stable cyclopalladated ferrocenylimine complex 3 was found to be a highly active one-component precatalyst for the amination of aryl chlorides in water in the presence of inexpensive KOH and t-BuOH as a base and an additive, respectively. 相似文献
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39.
Irina P. Smoliakova Jessica L. Wood Valeria A. Stepanova Relindis Y. Mawo 《Journal of organometallic chemistry》2010,695(3):360-8772
Tertiary, secondary and primary benzylamines, as well as structurally different oxazolines readily reacted with Pd(OAc)2 on silica gel to form cyclopalladated complexes containing a five or six-membered palladacycle with a (sp2)C-Pd or (sp3)C-Pd bond. The complexes were obtained in 45-98% yield, which is comparable with or exceeds the yields reported for preparation of the same compounds in solution. Aliphatic (sp3)C-H bond activation took place in the cyclopalladation of (S)-2-tert-butyl-4-phenyl-2-oxazoline on SiO2 leading to the exclusive formation of the corresponding endo palladacycle, whereas two products were reported for the same reaction performed in AcOH. 相似文献
40.
Massimo La Deda Iolinda Aiello Francesco Barigelletti 《Journal of organometallic chemistry》2005,690(4):857-861
The Nile Red dye, H(NR), forms cyclometalated R2-disubstituted-acetylacetonato square planar Pd(II) complexes (1-3; R = CH3, CF3, C6H5 respectively) whose photophysical properties were tested in cyclohexane, dichloromethane or methanol solutions. In cyclohexane 1-3 emit in the range 580-650 nm with a quantum yield ranging from 0.12 (R = CH3) to 0.50 (R = CF3) and lifetimes between 0.88 and 4.46 ns. These complexes form a new family of notably efficient red emitting organometallic dyes which could be of interest for practical applications. 相似文献