Palladium Nanoparticles in Suzuki Cross-Couplings: Tapping into the Potential of Tris-Imidazolium Salts for Nanoparticle Stabilization
作者:Marc Planellas、Roser Pleixats、Alexandr Shafir
DOI:10.1002/adsc.201100574
日期:2012.3
magnetic resonance, transmission electron microscopy, electron diffraction and dynamic light scattering. The new materials proved effective in Suzuki cross‐coupling at a loading of 0.2% palladium. Thus, using a tris‐imidazolium iodide‐palladium material, a series of biaryl products has been prepared starting from aryl bromides and some activated chlorides. The possibility that this catalytic activity might
受各种钯源在咪唑基离子液体中形成纳米颗粒的倾向性的启发,我们现在报道带有十六烷基链和桥连间苯三甲部分的三咪唑盐是有效的钯纳米颗粒稳定剂,是通过钯的Chaudret型氢化有效制备的。双(二亚苄基丙酮)钯(0)。钯纳米粒子已经以纯净形式分离出来,其特征为1H核磁共振,透射电子显微镜,电子衍射和动态光散射。在钯含量为0.2%的情况下,新材料在铃木交叉偶联中被证明是有效的。因此,使用碘化三咪唑鎓钯材料,已从芳基溴化物和一些活化的氯化物开始制备了一系列联芳基产品。这种可能性,这催化活性可能是由于钯n中形成-杂环卡宾已通过固态寻址13 C NMR,并且其中所述酸性2-H用甲基取代的咪唑鎓类似物的合成。
[EN] PYRROLO-PYRIDINE DERIVATIVES AS ACTIVATORS OF AMPK<br/>[FR] DÉRIVÉS PYRROLO-PYRIDINE UTILISÉS COMME ACTIVATEURS DE L'AMPK
申请人:GLAXOSMITHKLINE LLC
公开号:WO2011029855A1
公开(公告)日:2011-03-17
The present invention relates to pyrrolopyridone compounds of the formula (I), salts thereof, to pharmaceutical compositions containing them and their use in medicine. In particular, the invention relates to compounds as activators of AMPK.
Palladium-Catalyzed Preparation of Weinreb Amides from Boronic Acids and <i>N</i>-Methyl-<i>N</i>-methoxycarbamoyl Chloride
作者:Ravi Krishnamoorthy、Sang Q. Lam、Christopher M. Manley、R. Jason Herr
DOI:10.1021/jo902647h
日期:2010.2.19
A simple protocol for the synthesis of Weinreb benzamides and α,β-unsaturated Weinrebamides through a palladium-catalyzed cross-coupling reaction between organoboronic acids and N-methoxy-N-methylcarbamoyl chloride has been developed. The method is also applicable to the use of potassium organotrifluoroborates.
Transition metal complexes of N-heterocyclic carbenes, method of preparation and use in transition metal catalyzed organic transformations
申请人:Organ G. Michael
公开号:US20070073055A1
公开(公告)日:2007-03-29
The present invention relates to catalysts of transition metal complexes of N-heterocyclic carbenes, their methods of preparation and their use in chemical synthesis. The synthesis, ease-of-use, and activity of the compounds of the present invention are substantial improvements over in situ catalyst generation. Further, the transition metal complexes of N-heterocyclic carbenes of the present invention may be used as precatalysts in metal-catalyzed cross-coupling reactions.
Organocatalyzed Asymmetric Conjugate Addition of Heteroaryl and Aryl Trifluoroborates: a Synthetic Strategy for Discoipyrrole D
作者:Jiun‐Le Shih、Thien S. Nguyen、Jeremy A. May
DOI:10.1002/anie.201503528
日期:2015.8.17
Bis‐heteroaryl or bis‐aryl stereocenters were formed by an organocatalytic enantioselective conjugateaddition using the respective trifluoroborate salts as nucleophiles. Control studies suggested that fluoride dissociation is necessary in the anhydrous conditions. This strategy is applicable to the synthesis of discoipyrroleD, an inhibitor of BR5 fibroblast migration.