Suzuki-Miyaura Cross-Couplings
Mediated by <i>trans</i>-PdBr(<i>N</i>-Succ)(PPh<sub>3</sub>)<sub>2</sub>: A
Convenient Synthetic Method for Diarylmethanes and Aryl(heteroaryl)methanes
作者:Ian Fairlamb、Richard Taylor、Petr Sehnal
DOI:10.1055/s-0028-1083293
日期:——
Diarylmethanes can be accessed efficiently by Suzuki-Miyauracross-couplings of arylboronic acids with benzyl halides mediated by trans-PdBr(N-Succ)(PPh3)2. The methodology can be applied to the synthesis of aryl(heteroaryl)methanes. catalysis - palladium - pseudohalide - phosphine
A highly efficient catalyst for Suzuki–Miyaura coupling reaction of benzyl chloride under mild conditions
作者:Zhenhong Guan、Buyi Li、Guoliang Hai、Xinjia Yang、Tao Li、Bien Tan
DOI:10.1039/c4ra06551d
日期:——
organic synthesis, are usually synthesized through the traditional electrophilic substitution reaction i.e., Friedel–Crafts reaction, which suffers from the rearrangement and weak reactivity of aromatic compounds with deactivating/electron-withdrawing groups. The Suzuki–Miyauracouplingreaction of low-cost benzyl chloride as an alternative method overcomes these defects. Pd(II) organometallic catalysts
二芳基甲烷衍生物是有机合成中必不可少的组成部分,通常是通过传统的亲电取代反应(即Friedel-Crafts反应)合成的,该反应会遭受芳族化合物与失活/吸电子基团的重排和弱反应性的影响。低成本苄氯的Suzuki-Miyaura偶联反应作为一种替代方法克服了这些缺陷。加入Pd(II固定在三苯基膦-官能化微孔针织芳基聚合物)有机金属催化剂(KAPS(PH-PPH 3)-Pd)作为新型非均相催化剂用于苄基氯的Suzuki-Miyaura偶联反应中,并在温和条件下以76分钟-1(4569 h -1)的周转频率(TOF)表现出优异的催化活性。这项工作表明,催化剂的微孔结构可以迅速吸附底物,从而促进它们之间的相互作用,并最终提高催化效率。
Synthesis, Structure, and Catalytic Applications for <i>ortho</i>- and <i>meta</i>-Carboranyl Based NBN Pincer-Pd Complexes
o- and m-Carborane-based NBN pincerpalladiumcomplexes (oCB-L1)Pd, (oCB-L2)Pd, and (mCB-L1)Pd are synthesized in two steps from commercially available starting materials. The pincercomplexes were prepared by the reaction of bis-[R(hydroxy)methyl]-1,2-dicarba-closo-dodecaborane (R = 2-pyridyl oCB-L1, 6-methyl-2-pyridyl oCB-L2) or bis-[2-pyridyl (hydroxy)methyl]-1,2-dicarba-meta-dodecaborane (mCB-L1)
Simple Palladium(II) Precatalyst for Suzuki−Miyaura Couplings: Efficient Reactions of Benzylic, Aryl, Heteroaryl, and Vinyl Coupling Partners
作者:Michael J. Burns、Ian J. S. Fairlamb、Anant R. Kapdi、Petr Sehnal、Richard J. K. Taylor
DOI:10.1021/ol702291r
日期:2007.12.1
trans-PdBr(N-Succ)(PPh3)(2) (1) is a universally effective precatalyst for Suzuki-Miyaura cross-couplings of benzylic halides with aryl- or heteroarylboronic acids. Substituted aryl halides and halogenated cyclic enones can be cross-coupled with aryl- or vinylboronic acids in excellent yields. Catalyst recycling is also demonstrated.
Ruthenium(<scp>ii</scp>)-catalyzed deoxygenation of ketones
作者:Ruohua Gui、Chao-Jun Li
DOI:10.1039/d2cc03326g
日期:——
functionalities into methylene groups; however, it generally requires harsh reaction conditions and a strategy with wider applications demands further development. Herein, a ruthenium-catalyzed Wolff–Kishner type reduction of ketones is developed with 31 examples undermildconditions. This strategy tolerates aryl and alkyl ketones with reactive functional groups including halogens, hydroxyls, carboxylic acid