Fe- and Mn-modified SO42-/ZrO2 conjoined O2-Ac2O as composite catalytic system for highly selective nitration of 1-nitronaphthalene with NO2 to valuable 1,5-dinitronaphthalene

2021 ◽  
Author(s):  
Jiaqi Yan ◽  
Kuiyi You ◽  
Wenjin Ni ◽  
Ting Duan ◽  
Zhenpan Chen ◽  
...  
Keyword(s):  
Catalytic System ◽  
Efficient Method ◽  
Fe And Mn ◽  
Catalytic Nitration ◽  
Selective Nitration

In present study, a mild and efficient method for highly selective preparation of 1,5-dinitronaphthalene from the catalytic nitration of 1-nitronaphthalene with NO2 promoted by O2-Ac2O over Fe- and Mn-modified SO42-/ZrO2...

Efficient Copper-Catalyzed Synthesis of Substituted Pyrazoles at Room Temperature

Synlett ◽  
2018 ◽  
Vol 29 (20) ◽  
pp. 2689-2692 ◽  
Author(s):  
Haifeng Wang ◽  
Xiangli Sun ◽  
Shuangling Zhang ◽  
Guanglu Liu ◽  
Chunjie Wang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Catalytic System ◽  
Efficient Method ◽  
Room Temperature ◽  
Copper Catalyst ◽  
Condensation Reaction ◽  
Reaction Conditions ◽  
Short Reaction Time ◽  
Acid Catalyzed ◽  
Substituted Pyrazoles

An efficient method for the synthesis of pyrazoles through a copper-catalyzed condensation reaction has been developed. The new catalytic system not only maintained a broad substrate scope but was also active under acid-free reaction conditions, overcoming the conventional requirement for an acid-catalyzed system. Furthermore, the copper catalyst enabled this reaction to be performed at room temperature and in a short reaction time.

Efficient method for cyclopentanone synthesis from furfural: understanding the role of solvents and solubility in a bimetallic catalytic system

2018 ◽  
Vol 8 (20) ◽  
pp. 5259-5269 ◽  
Author(s):  
Manisha Dohade ◽  
Paresh L. Dhepe
Keyword(s):  
Catalytic System ◽  
Efficient Method ◽  
Solvent System ◽  
Carbon Catalyst ◽  
System P

We consider the conversion of furfural to cyclopentanone in a biphasic solvent system in the presence of bimetallic PtCo supported on carbon catalyst.

Nano-rod ZnO as a novel and reusable catalyst for C−P bond formation and hydrophosphonation of isatin derivatives under solvent-free conditions

2013 ◽  
Vol 91 (11) ◽  
pp. 1117-1122 ◽  
Author(s):  
Mona Hosseini-Sarvari ◽  
Mina Tavakolian
Keyword(s):  
Catalytic System ◽  
Efficient Method ◽  
Room Temperature ◽  
Bond Formation ◽  
Significant Loss ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Reaction Products ◽  
Solvent Free Conditions ◽  
Isatin Derivatives

A highly efficient method for the synthesis of α1-oxindole-α-hydroxyphosphonates via nano-rod ZnO catalyzed hydrophosphonation of isatin derivatives was developed. The reaction products are in excellent yields using the catalytic system nano-rod ZnO (25 mol%) under solvent-free conditions at room temperature. The catalyst can be reused several times without any significant loss of its activity.

Valence state analysis of elements by EPMA and its application

1990 ◽  
Vol 48 (2) ◽  
pp. 230-231
Author(s):  
Chen Liqing ◽  
Liu Zuqin ◽  
Zhang Wei
Keyword(s):  
Valence State ◽  
Line Intensities ◽  
Valence States ◽  
Valence Electrons ◽  
Fe And Mn ◽  
Intensity Ratios ◽  
State Analysis

Valence state analyses of Fe and Mn in oxides by EPMA have been reported in literature. In this paper, the effects of valence state on intensity ratios ILα/IKα and ILα/ILβ of Cu, Ni, Co, Fe, Mn, Cr and their oxides, and on intensity ratios ILβ2/ILα1 and ILγ1/ILα1 of Mo, Nb, Zr and their oxides were studied. It was observed that intensity ratios change with valence states in accordance with some regularities, and these effects could be utilized for analyzing the valence states of catalysts.Valence state analysis of elements by EPMA is based on the fact that changes in the states of valence electrons in the outer shells of an atom cause corresponding changes in line intensities. The M electrons of Cu, Ni, Co, Fe, Mn, Cr and the N electrons of Mo, Nb, Zr are valence electrons. Line Kα1,2 and six lines of L are produced from the transitions of K-L2,3 and L-M or L-N respectively.

Pilot plant plasma-catalytic system for the decomposition of a volatile organic compound

2016 ◽  
Vol 15 (3) ◽  
pp. 251-259
Author(s):  
Shreedhar Devkota ◽  
◽  
Jin Oh Jo ◽  
Dong Lyong Jang ◽  
Young Jin Hyun ◽  
...  
Keyword(s):  
Organic Compound ◽  
Catalytic System ◽  
Volatile Organic Compound ◽  
Pilot Plant ◽  
Volatile Organic
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