Covalent triazine framework-supported palladium as a ligand-free catalyst for the selective double carbonylation of aryl iodides under ambient pressure of CO

2016 ◽  
Vol 52 (14) ◽  
pp. 2960-2963 ◽  
Author(s):  
Zhifang Wang ◽  
Cuibo Liu ◽  
Yi Huang ◽  
Yuchen Hu ◽  
Bin Zhang
Keyword(s):  
Atmospheric Pressure ◽  
Ambient Pressure ◽  
Selective Synthesis ◽  
Aryl Iodides ◽  
Ligand Free ◽  
Supported Palladium ◽  
Covalent Triazine Framework

Carbonylation of aryl iodides with amines under atmospheric pressure of CO, catalyzed by Pd/CTFs (covalent triazine frameworks) without any specific additives, leads to the highly selective synthesis of α-ketoamides.

Double carbonylation of aryl iodides with amines under an atmospheric pressure of carbon monoxide using sulfur-modified Au-supported palladium

2015 ◽  
Vol 17 (4) ◽  
pp. 2358-2361 ◽  
Author(s):  
Nozomi Saito ◽  
Takahisa Taniguchi ◽  
Naoyuki Hoshiya ◽  
Satoshi Shuto ◽  
Mitsuhiro Arisawa ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Atmospheric Pressure ◽  
Nano Particles ◽  
Aryl Iodides ◽  
Supported Palladium

A double carbonylation of aryl iodides with amines proceeded by using Pd nano particles leached from SAPd to give α-ketoamides.

scholarly journals Carbonylative Suzuki–Miyaura Coupling Reactions of Aryl Iodides with Readily Available Polymer-Immobilized Palladium Nanoparticles

Synlett ◽  
2020 ◽  
Author(s):  
Tomohiro Yasukawa ◽  
Shu Kobayashi ◽  
Zhiyuan Zhu ◽  
Yasuhiro Yamashita
Keyword(s):  
Palladium Nanoparticles ◽  
Catalyst Loading ◽  
Coupling Reactions ◽  
Arylboronic Acids ◽  
Aryl Iodides ◽  
Ligand Free ◽  
Simple Filtration ◽  
Supported Palladium ◽  
High Yields ◽  
Low Catalyst Loading

Polysilane/alumina-supported palladium nanoparticle catalyzed carbonylative Suzuki–Miyaura coupling reactions under ligand-free conditions have been developed to synthesize diaryl ketones. High yields and selectivities were achieved even with low catalyst loading under atmospheric pressure of CO gas. A variety of aryl iodides and arylboronic acids could be utilized to afford the diaryl ketones in excellent yields. Moreover, the ligand-free immobilized palladium nanoparticles could be recovered by simple filtration and the catalytic activity could be maintained for several runs.

scholarly journals Selective Synthesis of N-Acylnortropane Derivatives in Palladium-Catalysed Aminocarbonylation

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1813
Author(s):  
László Kollár ◽  
Ádám Erdélyi ◽  
Haroon Rasheed ◽  
Attila Takács
Keyword(s):  
Synthetic Method ◽  
Selective Synthesis ◽  
Varied Structure ◽  
Biological Importance ◽  
Aryl Iodides ◽  
Palladium Catalyzed ◽  
Derivatives Of

The aminocarbonylation of various alkenyl and (hetero)aryl iodides was carried out using tropane-based amines of biological importance, such as 8-azabicyclo[3.2.1]octan-3-one (nortropinone) and 3α-hydroxy-8-azabicyclo[3.2.1]octane (nortropine) as N-nucleophile. Using iodoalkenes, the two nucleophiles were selectively converted to the corresponding amide in the presence of Pd(OAc)2/2 PPh3 catalysts. In the presence of several iodo(hetero)arenes, the application of the bidentate Xantphos was necessary to produce the target compounds selectively. The new carboxamides of varied structure, formed in palladium-catalyzed aminocarbonylation reactions, were isolated and fully characterized. In this way, a novel synthetic method has been developed for the producing of N-acylnortropane derivatives of biological importance.

scholarly journals Interactive Effects in Two-Droplets Combustion of RP-3 Kerosene under Sub-Atmospheric Pressure

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1229
Author(s):  
Hongtao Zhang ◽  
Zhihua Wang ◽  
Yong He ◽  
Jie Huang ◽  
Kefa Cen
Keyword(s):  
Burning Rate ◽  
Atmospheric Pressure ◽  
High Speed ◽  
Ambient Pressure ◽  
Interactive Effects ◽  
Propagation Time ◽  
High Speed Camera ◽  
Single Droplet ◽  
Fuel Droplets ◽  
Spacing Distance

To improve our understanding of the interactive effects in combustion of binary multicomponent fuel droplets at sub-atmospheric pressure, combustion experiments were conducted on two fibre-supported RP-3 kerosene droplets at pressures from 0.2 to 1.0 bar. The burning life of the interactive droplets was recorded by a high-speed camera and a mirrorless camera. The results showed that the flame propagation time from burning droplet to unburned droplet was proportional to the normalised spacing distance between droplets and the ambient pressure. Meanwhile, the maximum normalised spacing distance from which the left droplet can be ignited has been investigated under different ambient pressure. The burning rate was evaluated and found to have the same trend as the single droplet combustion, which decreased with the reduction in the pressure. For every experiment, the interactive coefficient was less than one owing to the oxygen competition, except for the experiment at L/D0 = 2.5 and P = 1.0 bar. During the interactive combustion, puffing and microexplosion were found to have a significant impact on secondary atomization, ignition and extinction.

scholarly journals Silver-catalyzed one-pot synthesis of benzyl 2-alkynoates under ambient pressure of CO2 and ligand-free conditions

Tetrahedron ◽  
2017 ◽  
Vol 73 (7) ◽  
pp. 900-906 ◽  
Author(s):  
Fang-Jie Guo ◽  
Zhi-Zhi Zhang ◽  
Jing-Yun Wang ◽  
Jing Sun ◽  
Xiang-Chen Fang ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
One Pot ◽  
One Pot Synthesis ◽  
Ligand Free

scholarly journals Effects of Ambient Pressure on the Instability of a Liquid Boiling Explosively at the Superheat Limit

1986 ◽  
Vol 108 (2) ◽  
pp. 418-424 ◽  
Author(s):  
D. Frost ◽  
B. Sturtevant
Keyword(s):  
Atmospheric Pressure ◽  
Bubble Growth ◽  
Absolute Stability ◽  
Pressure Field ◽  
Ambient Pressure ◽  
Small Temperature ◽  
Instability Theory ◽  
Two Stages ◽  
Single Droplets ◽  
Superheat Limit

The effect of ambient pressure on the intrinsic instability of rapid vaporization in single droplets boiling explosively at the limit of superheat has been studied experimentally and theoretically. The instability that distorts the evaporating interface and substantially enhances the mass flux at atmospheric pressure is suppressed at high pressure. The radiated pressure field is two orders of magnitude smaller from stabilized bubbles than from unstable. At intermediate pressures bubble growth occurs in two stages, first stable, then unstable. The Landau–Darrieus instability theory predicts absolute stability at atmospheric pressure for a spherical bubble, whereas the theory for planar interfaces yields results in general agreement with observation. The sensitivity of the instability to temperature suggests that small temperature nonuniformities may be responsible for quantitative departures of the behavior from predictions.

ChemInform Abstract: Atmospheric Pressure Aminocarbonylation of Aryl Iodides Using Palladium Nanoparticles Supported on MOF-5.

ChemInform ◽  
2012 ◽  
Vol 43 (21) ◽  
pp. no-no
Author(s):  
Tuan T. Dang ◽  
Yinghuai Zhu ◽  
Subhash C. Ghosh ◽  
Anqi Chen ◽  
Christina L. L. Chai ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Palladium Nanoparticles ◽  
Aryl Iodides

Ligand-Free Pd-Catalyzed and Copper-Assisted C–H Arylation of Quinazolin-4-ones with Aryl Iodides under Microwave Heating

2015 ◽  
Vol 17 (7) ◽  
pp. 1700-1703 ◽  
Author(s):  
Sylvain Laclef ◽  
Marine Harari ◽  
Julien Godeau ◽  
Isabelle Schmitz-Afonso ◽  
Laurent Bischoff ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Aryl Iodides ◽  
Ligand Free
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