A palladium NNC-pincer complex: an efficient catalyst for allylic arylation at parts per billion levels

2015 ◽  
Vol 51 (18) ◽  
pp. 3886-3888 ◽  
Author(s):  
Go Hamasaka ◽  
Fumie Sakurai ◽  
Yasuhiro Uozumi
Keyword(s):  
Complex Catalyst ◽  
Efficient Catalyst ◽  
Pincer Complex

Allylic arylation of allylic acetates by sodium tetraarylborates in the presence of ppb to ppm (molar) loadings of a palladium NNC-pincer complex catalyst in methanol at 50 °C gave the corresponding arylated products in excellent yields.

Palladium NNC Pincer Complex as an Efficient Catalyst for the Cycloisomerization of Alkynoic Acids

2016 ◽  
Vol 358 (20) ◽  
pp. 3283-3292 ◽  
Author(s):  
Nerea Conde ◽  
Raul SanMartin ◽  
María Teresa Herrero ◽  
Esther Domínguez
Keyword(s):  
Efficient Catalyst ◽  
Pincer Complex

scholarly journals Ionic liquids modified cobalt/ZSM-5 as a highly efficient catalyst for enhancing the selectivity towards KA oil in the aerobic oxidation of cyclohexane

2019 ◽  
Vol 17 (1) ◽  
pp. 639-646 ◽  
Author(s):  
Yun Hong ◽  
Yanxiong Fang ◽  
Dalei Sun ◽  
Xiantai Zhou
Keyword(s):  
Ionic Liquids ◽  
Heterogeneous Catalyst ◽  
Reaction Temperature ◽  
Aerobic Oxidation ◽  
Power Input ◽  
Homogeneous Catalyst ◽  
Complex Catalyst ◽  
Efficient Catalyst ◽  
Reaction Pressure ◽  
And Performance

AbstractThe industrial oxidation of cyclohexane is currently performed with very low conversion level, i.e. 4-6% conversion and poor selectivity for cyclohexanone and cyclohexanol (K-A oil), i.e.70-85%, at above 150oC reaction temperature and above 10atm reaction pressure using molecular oxygen oxidant and homogeneous catalyst. Several disadvantages are, however, associated with the process, such as, complex catalyst-product separation, high power input, and low safe operation. Therefore, the oxidation of cyclohexane using heterogeneous catalyst oxygen oxidant from air at mild conditions has received particular attention. Aerobic oxidation of cyclohexane over ionic liquids modified cobalt/ZSM-5 (IL-Co/ZSM-5) in absence of solvents was developed in this article. The prepared catalysts were characterized by XRD, FT-IR, N2 adsorption-desorption, SEM, TEM and XPS analyses. The influence of reaction parameters on the oxidation of cyclohexane was researched, such as the various catalysts, reaction temperature, reaction time, and the reaction pressure, on the process. Highly selective synthesis of KA oil was performed by aerobic oxidation of cyclohexane using ionic liquids modified cobalt/ZSM-5 (IL-Co/ZSM-5) as the catalyst in absence of solvents for the first time. A selectivity of up to 93.6% of KA oil with 9.2% conversion of cyclohexane was produced at 150℃ and 1.5 MPa after 3 h, with about 0.1 mol cyclohexane, C7mimHSO4-Co/ZSM-5 catalyst equal to 6.0 wt%, respectively. The induction period of oxidation was greatly shortened when the ionic liquid was supported on ZSM-5. The catalyst was easy to centrifuge and was reused after five cycles. It was found that both the characterization and performance of the catalysts revealed that both the presence of oxygen vacancies with incorporation of Co ions into the framework of ZSM-5 and the introduction of C7mimHSO4 into the ZSM-5 leads to the both satisfactory selectivity and robust stability of the C7mimHSO4-Co/ZSM-5 heterogeneous catalyst.

scholarly journals Rapid reversible borane to boryl hydride exchange by metal shuttling on the carborane cluster surface

2017 ◽  
Vol 8 (8) ◽  
pp. 5399-5407 ◽  
Author(s):  
Bennett J. Eleazer ◽  
Mark D. Smith ◽  
Alexey A. Popov ◽  
Dmitry V. Peryshkov
Keyword(s):  
Metal Center ◽  
Efficient Catalyst ◽  
Cluster Surface ◽  
Pincer Complex

The ruthenium carboranyl pincer complex featuring fluxional ”cage-walking“ of the metal center is an efficient catalyst for cyclooctane transfer dehydrogenation.

scholarly journals A Palladium NCP Pincer Complex as an Efficient Catalyst for Intramolecular Direct Arylation

2015 ◽  
Author(s):  
Raul Sanmartin ◽  
Nerea Conde ◽  
Fátima Churruca ◽  
María Teresa Herrero ◽  
Esther Domínguez
Keyword(s):  
Efficient Catalyst ◽  
Direct Arylation ◽  
Pincer Complex

Highly efficient synthesis of primary amides via aldoximes rearrangement in water under air atmosphere catalyzed by an ionic ruthenium pincer complex

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 37093-37098 ◽  
Author(s):  
Fa-Liu Yang ◽  
Xinju Zhu ◽  
Dun-Kang Rao ◽  
Xiao-Niu Cao ◽  
Ke Li ◽  
...  
Keyword(s):  
Efficient Synthesis ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Air Atmosphere ◽  
Pincer Complex

An ionic Ru pincer complex was demonstrated to be highly efficient catalyst for conversion of aldoximes and aldehydes into corresponding primary amides with environmental benignity, operational convenience and catalytic loading as low as 0.5 mol%.

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