scholarly journals Greener Friedel-Crafts Acylation Using Microwave-Enhanced Reactivity of Bismuth Triflate in the Friedel-Crafts Benzoylation of Aromatic Compounds with Benzoic Anhydride

2017 ◽  
Vol 2 (1) ◽  
pp. 571-575 ◽  
Author(s):  
Phuong Hoang Tran ◽  
Hai Truong Nguyen ◽  
Poul Erik Hansen ◽  
Thach Ngoc Le
Keyword(s):  
Aromatic Compounds ◽  
Benzoic Anhydride ◽  
Bismuth Triflate

Bismuth Triflate Catalyzed Mononitration of Aromatic Compounds with N2O5

2014 ◽  
Vol 11 (7) ◽  
pp. 509-512 ◽  
Author(s):  
Hua Qian ◽  
Ya Wang ◽  
Dabin Liu ◽  
Chunxu Lv
Keyword(s):  
Aromatic Compounds ◽  
Bismuth Triflate

scholarly journals Friedel-crafts acylation of aromatic compounds using Triflat bismuth

2014 ◽  
Vol 17 (2) ◽  
pp. 10-14
Author(s):  
Phuong Hoang Tran ◽  
Thanh Duy Anh Nguyen ◽  
Thach Ngoc Le
Keyword(s):  
Reaction Time ◽  
Acetic Anhydride ◽  
Lewis Acid ◽  
Aromatic Compounds ◽  
Good Yield ◽  
Efficient Catalyst ◽  
Short Reaction Time ◽  
Mild Conditions ◽  
Bismuth Triflate ◽  
Work Up

Friedel-Crafts acylation of aromatic compounds with acetic anhydride as acylating reagent was investigated in the presence of Lewis acid. Bismuth trifluoromethanesulfonate was found to be efficient catalyst for Friedel-Crafts acetylation under mild conditions. Bismuth triflate is safe-to-handle, simple and clean work-up, good yield and short reaction time

ChemInform Abstract: Bismuth Triflate Catalyzed Mononitration of Aromatic Compounds with N2O5.

ChemInform ◽  
2014 ◽  
Vol 45 (43) ◽  
pp. no-no
Author(s):  
Hua Qian ◽  
Ya Wang ◽  
Dabin Liu ◽  
Chunxu Lv
Keyword(s):  
Aromatic Compounds ◽  
Bismuth Triflate

The preparation of thiophenes. III. From aromatic compounds and carbon disulphide

1981 ◽  
Vol 31 (1) ◽  
pp. 163-166 ◽  
Author(s):  
Farid Azizian ◽  
James S. Pizey
Keyword(s):  
Aromatic Compounds ◽  
Carbon Disulphide

Bromination of some aromatic compounds by means of bromine in tetrachloroethane medium

1974 ◽  
Vol 24 (1-2) ◽  
pp. 59-61 ◽  
Author(s):  
A. I. Hashem
Keyword(s):  
Aromatic Compounds

1679 Fatty acid profile, sensory traits, and aromatic compounds of chops from lambs fed ground woody plants as roughage in feedlot finishing diets

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 818-818
Author(s):  
K. R. Wall ◽  
C. R. Kerth ◽  
T. R. Whitney ◽  
S. B. Smith ◽  
J. L. Glasscock ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Aromatic Compounds ◽  
Woody Plants ◽  
Finishing Diets

Tandem Mass Spectrometric Evaluation of Core Structures of Aromatic Compounds after Catalytic Deoxygenation

2017 ◽  
Author(s):  
Xueming Dong
Keyword(s):  
Aromatic Compounds ◽  
Supported Catalyst ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Aromatic Rings ◽  
Tandem Mass Spectrometric ◽  
Catalytic Deoxygenation ◽  
Oxygen Atoms

Catalytic deoxygenation of coal enhances the stability and combustion performance of coal-derived liquids. However, determination of the selectivity of removal of oxygen atoms incorporated in or residing outside of aromatic rings is challenging. This limits the ability to evaluate the success of catalytic deoxygenation processes. A mass spectrometric method, in-source collision-activated dissociation (ISCAD), combined with high resolution product ion detection, is demonstrated to allow the determination of whether the oxygen atoms in aromatic compounds reside outside of aromatic rings or are part of the aromatic system, because alkyl chains can be removed from aromatic cores via ISCAD. Application of this method for the analysis of a subbituminous coal treated using a supported catalyst revealed that the catalytic treatment reduced the number of oxygen-containing heteroaromatic rings but not the number of oxygen atoms residing outside the aromatic rings.<br>

Tandem Mass Spectrometric Evaluation of Core Structures of Aromatic Compounds after Catalytic Deoxygenation

2017 ◽  
Author(s):  
Xueming Dong
Keyword(s):  
Aromatic Compounds ◽  
Supported Catalyst ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Aromatic Rings ◽  
Tandem Mass Spectrometric ◽  
Catalytic Deoxygenation ◽  
Oxygen Atoms

Catalytic deoxygenation of coal enhances the stability and combustion performance of coal-derived liquids. However, determination of the selectivity of removal of oxygen atoms incorporated in or residing outside of aromatic rings is challenging. This limits the ability to evaluate the success of catalytic deoxygenation processes. A mass spectrometric method, in-source collision-activated dissociation (ISCAD), combined with high resolution product ion detection, is demonstrated to allow the determination of whether the oxygen atoms in aromatic compounds reside outside of aromatic rings or are part of the aromatic system, because alkyl chains can be removed from aromatic cores via ISCAD. Application of this method for the analysis of a subbituminous coal treated using a supported catalyst revealed that the catalytic treatment reduced the number of oxygen-containing heteroaromatic rings but not the number of oxygen atoms residing outside the aromatic rings.<br>

Photocatalytic Alkylation of Pyrroles and Indoles with α-Diazo Esters

2019 ◽  
Author(s):  
Łukasz Ciszewski ◽  
Jakub Durka ◽  
Dorota Gryko
Keyword(s):  
Aromatic Compounds ◽  
Reaction Pathway ◽  
Alkylating Agents ◽  
Catalytic Amount ◽  
Radical Formation ◽  
Reaction Selectivity ◽  
Diazo Esters ◽  
Electron Withdrawing Substituents

This article describes direct photoalkylation of electron-rich aromatic compounds with diazo compoiunds. C-2 alkylated indoles and pyrroles are obtained with good yields even though the photocatalyst (Ru(bpy)3Cl2) loading is as low as 0.075 mol %. For substrates bearing electron-withdrawing substituents the addition of a catalytic amount of N,N-dimethyl-4-methoxyaniline is required. Both EWG-EWG and EWG-EDG substituted diazo esters are suitable as alkylating agents. The reaction selectivity and mechanistic experiments suggest that carbenes/carbenoid intermediates are not involved in the reaction pathway, instead radical formation is proposed.

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