irradiation has been shown to have a beneficial effect on catalyst preparation. The catalyst exhibited excellent activity in ligand‐free C−C Suzuki and Heck couplings with a large number of aryl iodide and bromides, in which microwave irradiation use cuts down reaction time. Pd/Si‐CD have shown high activity and selectivity in the hydrogenationreaction, and the semihydrogenation of phenyl acetylene was also
Palladium‐Based Catalysts Supported by Unsymmetrical XYC
<sup>–1</sup>
Type Pincer Ligands: C5 Arylation of Imidazoles and Synthesis of Octinoxate Utilizing the Mizoroki–Heck Reaction
作者:Ankur Maji、Ovender Singh、Sain Singh、Aurobinda Mohanty、Pradip K. Maji、Kaushik Ghosh
DOI:10.1002/ejic.202000211
日期:2020.5.10
methyl)phenyl)morpholine H = dissociableproton). Molecular structure of catalysts (C1–C4) were further established by single X‐ray crystallographic studies. The catalytic performance of palladacycles (C1–C4) was explored with the direct Csp2–H arylation of imidazoles with aryl halide derivatives. These palladacycles were also applied for investigating of Mizoroki–Heck reactions with aryl halides and acrylate
使用简单的锚定配体L 1-4 H(L 1 H = 2-(((2-(4-‐甲氧基亚苄基)-1-1-苯基肼基)),设计并合成了一系列新的不对称(XYC –1型)Palladacycles(C1 – C4))甲基)吡啶,L 2 H = N,N-二甲基-4-((2-苯基-2-(吡啶-2-基甲基)肼基)甲基)苯胺,L 3 H = N,N-二乙基-4- ((2-苯基-2-(吡啶-2-基甲基)肼基)甲基)苯胺和L 4 H = 4-(4-((2-苯基-2-(吡啶-2-基甲基)肼基)甲基)苯基吗啉H =游离质子)。催化剂的分子结构(C1 - C4)通过单X射线晶体学研究进一步确定。通过咪唑与芳基卤化物衍生物的直接Csp 2 -H芳基化研究了palladacycles(C1 - C4)的催化性能。这些palladacycles还用于研究与芳基卤化物和丙烯酸酯衍生物的Mizoroki-Heck反应。在催化循环过
A convenient, efficient and reusable N-heterocyclic carbene-palladium(<scp>ii</scp>) based catalyst supported on magnetite for Suzuki–Miyaura and Mizoroki–Heck cross-coupling reactions
作者:Vishal Kandathil、Bradley D. Fahlman、B. S. Sasidhar、Shivaputra A. Patil、Siddappa A. Patil
DOI:10.1039/c7nj01876b
日期:——
NO2-NHC-Pd@Fe3O4 nanomagnetic catalyst showed excellent catalytic activity in both Suzuki–Miyaura and Mizoroki–Heck cross-coupling reactions for various substrates under mild reaction conditions. Recovery of the NO2-NHC-Pd@Fe3O4 nanomagnetic catalyst from the reaction mixture was easily accomplished by applying an external magnet. The recovered NO2-NHC-Pd@Fe3O4 nanomagnetic catalyst exhibited very good catalytic
在目前的工作中,一种新型的磁性纳米颗粒负载的N-杂环卡宾-钯(II)(NO 2 -NHC-Pd @ Fe 3 O 4)纳米磁性催化剂是通过在有氧条件下使用廉价的化学药品通过简便的多步合成法合成的。NO 2 -NHC-Pd @ Fe 3 O 4纳米磁性催化剂通过各种分析技术进行了表征,例如衰减全反射红外光谱(ATR-IR),电感耦合等离子体原子发射光谱(ICP-AES),能量色散X射线光谱(EDS),场发射扫描电子显微镜(FESEM),透射电子显微镜(TEM),X射线粉末衍射(XRD),热重分析(TGA)和Brunauer–Emmett–Teller表面积分析(BET)。合成的NO 2 -NHC-Pd @ Fe 3 O 4纳米磁性催化剂在轻度反应条件下,在各种基材的Suzuki-Miyaura和Mizoroki-Heck交叉偶联反应中均表现出出色的催化活性。NO 2 -NHC-Pd @ Fe
Investigation of (<i>E</i>)-3-[4-(2-Oxo-3-aryl-chromen-4-yl)oxyphenyl]acrylic Acids as Oral Selective Estrogen Receptor Down-Regulators
作者:Sébastien L. Degorce、Andrew Bailey、Rowena Callis、Chris De Savi、Richard Ducray、Gillian Lamont、Philip MacFaul、Mickael Maudet、Scott Martin、Rémy Morgentin、Richard A. Norman、Aurélien Peru、Jennifer H. Pink、Patrick A. Plé、Bryan Roberts、James S. Scott
DOI:10.1021/acs.jmedchem.5b00066
日期:2015.4.23
A novel estrogenreceptordown-regulator, 7-hydroxycoumarin (5, SS5020), has been reported with antitumor effects against chemically induced mammary tumors. Here, we report on our own investigation of 7-hydroxycoumarins as potential selectiveestrogenreceptordown-regulators, which led us to the discovery of potent down-regulating antagonists, such as 33. Subsequent optimization and removal of the
Orally active .beta.-lactam inhibitors of human leukocyte elastase. 2. Effect of C-4 substitution
作者:William K. Hagmann、Amy L. Kissinger、Shrenik K. Shah、Paul E. Finke、Conrad P. Dorn、Karen A. Brause、Bonnie M. Ashe、Hazel Weston、Alan L. Maycock
DOI:10.1021/jm00058a015
日期:1993.3
concern. Fortunately, compounds containing 4-hydroxybenzoic acid and 4-hydroxyphenylacetic acid ethers at C-4 were among the most active analogs. These phenolic acids are also found as urinary metabolites in healthy humans. Other heteroaryls at C-4 were also orallyactive in this model despite relatively modest enzyme activity.