An Aerobic and Very Fast Pd/C-Catalyzed Ligand-Free and Aqueous Suzuki Reaction Under Mild Conditions
作者:Chun Liu、Xiaofeng Rao、Yixia Zhang、Xinmin Li、Jieshan Qiu、Zilin Jin
DOI:10.1002/ejoc.201300334
日期:2013.7
An aerobic, ligand-free Suzukireaction catalyzed by Pd/C in aqueous media has been developed. This method is a very simple, efficient and mild protocol for the cross-coupling of aryl bromides with arylboronic acids, and the reactions proceeded smoothly in excellent yields within short reaction times. Control experiments demonstrated that the Pd/C-cata
Green synthesis of fluorinated biaryl derivatives via thermoregulated ligand/palladium-catalyzed Suzuki reaction
作者:Ning Liu、Chun Liu、Zilin Jin
DOI:10.1016/j.jorganchem.2011.04.007
日期:2011.7
and material science due to their unique physical properties. This paper reports an efficient and environmentally benign protocol for the Suzukireaction of aryl halides with fluorinated arylboronic acids over a thermoregulated ligand/palladium catalyst using water as sole medium, affording a variety of fluorinated biaryls, including fluorinated liquid crystals, in excellent yields. The catalyst could
A series of novel triazinonide-bridged bisimidazolium pincers were easily synthesized by quaternization of functionalized N-phenylimidazoles with highly reactive cyanuric chloride under mild conditions. The pincer 3c was proven to be a very efficient ligand for in situ Pd-catalyzed SuzukiâMiyaura reaction with ppm-level catalyst loading.
Magnetic MCM-41 nanoparticles as a support for the immobilization of a palladium organometallic catalyst and its application in C–C coupling reactions
作者:Bahman Tahmasbi、Arash Ghorbani-Choghamarani
DOI:10.1039/c9nj02727k
日期:——
In this study, the surface of magnetic MCM-41 nanoparticles (MCM-41/Fe3O4) was modified by 3-aminopropyltriethoxysilane (APTES) and further, 1-methyl imidazole was anchored on their surface using cyanuric chloride as a linker. Then, Pd2+ ions were immobilized on the surface of the modified MCM-41/Fe3O4 (Pd-imi-CC@MCM-41/Fe3O4), and its application was studied as a magnetically recyclable nanocatalyst
在这项研究中,磁性MCM-41纳米颗粒(MCM-41 / Fe 3 O 4)的表面被3-氨丙基三乙氧基硅烷(APTES)改性,然后使用氰尿酰氯作为连接剂将1-甲基咪唑固定在其表面上。然后,将Pd 2+离子固定在改性MCM-41 / Fe 3 O 4(Pd-imi-CC @ MCM-41 / Fe 3 O 4)的表面上。),并研究了其作为可磁循环利用的纳米催化剂在广泛的芳基卤化物与丙烯酸丁酯,丙烯酸甲酯,丙烯腈,苯基硼酸或3,4-二氟苯基硼酸之间的碳-碳偶联反应中的条件-无配体和空气气氛。该催化剂具有Fe 3 O 4纳米颗粒和中孔MCM-41的优点。通过TEM,SEM,EDS,WDX,N 2吸附-脱附等温线,XRD,TGA,FT-IR和AAS对催化剂的结构进行了表征。同样,回收的催化剂通过SEM,AAS和FT-IR。从碳-碳偶合反应获得的所有产物均具有优异的收率和较高的TON和TOF值,这表
Biochar as heterogeneous support for immobilization of Pd as efficient and reusable biocatalyst in C–C coupling reactions
Heck–Mizoroki cross‐couplingreactions. The structure of the catalyst was characterized using scanning electron microscopy, transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, thermogravimetric analysis, X‐ray diffraction and atomic absorption spectroscopy. The catalyst can be reused several times without a decrease in its catalytic efficiency. In addition to the several advantages reported