Magnetite@MCM‐41 nanoparticles as support material for Pd‐
<i>N</i>
‐heterocyclic carbene complex: A magnetically separable catalyst for Suzuki–Miyaura reaction
coupled plasma–optical emission spectroscopy (ICP‐OES) analysis. The catalytic activity of Magnetite@MCM‐41@NHC@Pd heterogeneous catalyst done on Suzuki–Miyaurareactions of aryl halides with different substituted arylboronic acid derivatives. All coupling reactions afforded excellent yields and up to 408404 Turnover Frequency (TOF) h−1 in the presence of 2 mg of Magnetite@MCM‐41@NHC@Pd catalyst (0.0564 mmol g−1
Using highly electron-rich monophosphine ligands, Suzuki cross-coupling of heteroaromatic chlorides with various boronic acids was carried out in high yields. High yields were also often observed when steric heteroaromatic chlorides were employed in Suzukicross-couplingreactions. Suzuki coupling - ClickPhos - heteroaromatic chlorides - palladium
Pd-Catalyzed Decarboxylation and Dual C(sp<sup>3</sup>)–H Functionalization Protocols for the Synthesis of 2,4-Diarylpyridines
作者:Raghuram Gujjarappa、Nagaraju Vodnala、Mohan Kumar、Chandi C. Malakar
DOI:10.1021/acs.joc.8b02971
日期:2019.5.3
The Pd-catalyzed decarboxylation and dualC(sp3)–Hbondfunctionalization approaches have been described for the preparation of symmetrical and unsymmetrical 2,4-diarylpyridines. The developed transformations were realized using nonactivated aromatic ketones and amino acids as C–N sources. The efficacy of the catalyst and reagent combination drives the transformation toward the formation of desired
The 1,3-Diaminobenzene-Derived Aminophosphine Palladium Pincer Complex {C6H3[NHP(piperidinyl)2]2Pd(Cl)} - A Highly Active Suzuki-Miyaura Catalyst with Excellent Functional Group Tolerance
作者:Jeanne L. Bolliger、Christian M. Frech
DOI:10.1002/adsc.200900848
日期:——
The rapidly prepared 1,3‐diaminobenzene‐derived aminophosphine pincer complex C6H3[NHP(piperidinyl)2]2Pd(Cl)} (1) is an effective Suzuki catalyst with excellentfunctionalgrouptolerance. Side‐product formations, such as homocoupling, debromation or protodeboration have only rarely been detected and if so, were in all cases below the 5% level. The presented reaction protocol is universally applicable
快速制备的1,3-二氨基苯衍生的氨基膦钳形配合物C 6 H 3 [NHP(哌啶基)2 ] 2 Pd(Cl)}(1)是一种有效的Suzuki催化剂,具有出色的官能团耐受性。仅很少检测到副产物形成,例如均偶联,去溴化或原去硼,如果这样,在所有情况下均低于5%的水平。提出的反应方案是普遍适用的。实验观察表明,钯纳米颗粒的催化活性形式1。
Substitution of the Nitro Group with Grignard Reagents: Facile Arylation and Alkenylation of Pyridine <i>N</i>-Oxides
作者:Fang Zhang、Song Zhang、Xin-Fang Duan
DOI:10.1021/ol3026632
日期:2012.11.2
unprecedented substitution of a nitro group with aryl or alkenyl groups of Grignard reagents affords 2-aryl or alkenylpyridine N-oxides in modest to high yields with high chemoselectivity. This protocol allows a simple and clean synthesis of various 2-substituted pyridineN-oxides and the corresponding pyridine derivatives. Furthermore, straightforward one-pot iterative functionality of pyridineN-oxides could