作者:Bandna、Nitul Ranjan Guha、Arun K. Shil、Dharminder Sharma、Pralay Das
DOI:10.1016/j.tetlet.2012.07.096
日期:2012.9
Ligand-free solid-supported nano and microparticles of Pd(0) (SS-Pd) were used as a heterogeneous catalyst in carbon-heteroatom bond formation reactions. Nitro substituted aryl halides reacted with oxygen, sulfur, and nitrogen nucleophiles to afford the corresponding products in good yields. A one-pot sequential cross coupling and nitro-reduction was also performed using the same SS-Pd catalyst to
Immobilized palladium nanoparticles on MNPs@A-<i>N</i>
-AEB as an efficient catalyst for C-O bond formation in water as a green Solvent
作者:Firouz Matloubi Moghaddam、Mohammad Eslami
DOI:10.1002/aoc.4463
日期:2018.9
presented as an efficient, and reusable magnetically heterogeneous catalyst for the C‐O coupling reaction, namely Ullmann condensation reactions in an aqueous medium. This heterogeneous catalyst shows superior reactivity for the C‐O arylation of different aryl halide (chloride, bromide, and iodide) with phenolderivatives to afford the desired products in good to excellent yields within short reaction
Fe-MIL-101 modified by isatin-Schiff-base-Co: a heterogeneous catalyst for C–C, C–O, C–N, and C–P cross coupling reactions
作者:Majid Rouzifar、Sara Sobhani、Alireza Farrokhi、José Miguel Sansano
DOI:10.1039/d1nj03468e
日期:——
recyclable catalyst for efficient Ullmann, Buchwald–Hartwig, Hirao, Hiyama and Mizoroki–Heck cross-coupling reactions of several aryl halides/phenylboronic acid/phenyltosylate with phenols, anilines/heterocyclic amines, triethyl phosphite, triethoxyphenylsilane and alkenes and generates the expected coupling products in good to high yields.
Palladium supported on zinc ferrite: an efficient catalyst for ligand free C–C and C–O cross coupling reactions
作者:Abhilash S. Singh、Suresh S. Shendage、Jayashree M. Nagarkar
DOI:10.1016/j.tetlet.2013.09.027
日期:2013.11
An efficientsuperparamagnetic Pd–ZnFe2O4 solid catalyst has been synthesized by loading Pd(0) species on zinc ferritenanoparticles. Sonogashira cross couplings between terminal alkynes and aryl halides were achieved in the absence of any Cu co-catalyst. A Heck–Matsuda coupling reaction of structurally different aryldiazonium tetrafluoroborate substrates was preceded at 40 °C in water. Cyanation of
通过将Pd(0)物种负载在铁氧体锌纳米颗粒上,已经合成了有效的超顺磁性Pd-ZnFe 2 O 4固体催化剂。在没有任何铜助催化剂的情况下,在末端炔烃和卤代芳基化合物之间实现了Sonogashira交叉偶联。在40°C的水中进行结构不同的芳基重氮四氟硼酸盐底物的Heck-Matsuda偶联反应。使用K 4 [Fe(CN)6 ]作为氰化物源,在Pd–ZnFe 2 O 4上成功完成了芳基卤化物的氰化。该催化剂也用于Ullmann型交叉偶联反应。优异的产品收率,可重复使用性和简单的后处理,使该催化剂对于C–C和C–O偶联反应非常有效。产物的高收率,易于分离以及钯从催化剂表面的浸出可忽略不计,证实了这些催化反应中真正的异质性。
Ligand free copper-catalyzed heterogeneous O-arylation reaction under green condition
A highly porous Zn-based iso-reticular metal–organicframework (IRMOF-3) has been selected for covalent modification. Pyridine-2-aldehyde has been used to decorate the free amine group of IRMOF-3 in the porous matrix. Schiff base moiety thus generated has been availed to anchor copper(II) ions to prepare the desired catalyst that catalyzes O-arylation reactions heterogeneouslyunder mild reaction conditions