Synthesis of Aromatic Cycloketones via Intramolecular Friedel - Crafts Acylation Catalyzed by Heteropoly Acids

2007 ◽  
Vol 60 (1) ◽  
pp. 80 ◽  
Author(s):  
Kun Lan ◽  
Shao Fen ◽  
Zixing Shan
Keyword(s):  
Liquid Phase ◽  
Good Yield ◽  
Heteropoly Acid ◽  
Heteropoly Acids ◽  
Benzoic Acids ◽  
Decarboxylation Reaction ◽  
First Time

Under liquid-phase conditions, the intramolecular Friedel–Crafts acylation of aryl benzoic acids catalyzed by heteropoly acids were investigated for the first time. Several aryl benzoic acids were refluxed and dehydrated in chlorobenzene in the presence of 0.2 equivalents of a heteropoly acid, and anthraquinone, anthrone, and xanthone were obtained in good yield. At the same time, an intermolecular Friedel–Crafts acylation and decarboxylation reaction were observed in this experiment.

scholarly journals Influence of a Standing Wave Flow-Field on the Dynamics of a Spray Diffusion Flame

Fluids ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 27
Author(s):  
J. Barry Greenberg ◽  
David Katoshevski
Keyword(s):  
Liquid Phase ◽  
Flow Field ◽  
Standing Wave ◽  
Diffusion Flame ◽  
Stokes Number ◽  
Flame Height ◽  
Wave Flow ◽  
Two Dimensional ◽  
Governing Equations ◽  
First Time

A theoretical investigation of the influence of a standing wave flow-field on the dynamics of a laminar two-dimensional spray diffusion flame is presented for the first time. The mathematical analysis permits mild slip between the droplets and their host surroundings. For the liquid phase, the use of a small Stokes number as the perturbation parameater enables a solution of the governing equations to be developed. Influence of the standing wave flow-field on droplet grouping is described by a specially constructed modification of the vaporization Damkohler number. Instantaneous flame front shapes are found via a solution for the usual Schwab–Zeldovitch parameter. Numerical results obtained from the analytical solution uncover the strong bearing that droplet grouping, induced by the standing wave flow-field, can have on flame height, shape, and type (over- or under-ventilated) and on the existence of multiple flame fronts.

Photochromic and photothermal hydrogel derived from natural amino acid and heteropoly acid

Soft Matter ◽  
2021 ◽  
Author(s):  
Xue Wang ◽  
Xiaohuan Liu ◽  
Zhiyuan Ma ◽  
Chuanling Mu ◽  
Wen Li
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Heteropoly Acid ◽  
Acidic Condition ◽  
Heteropoly Acids ◽  
Natural Amino Acid ◽  
Basic Amino Acids

A new kind of supramolecular hydrogels have been designed and synthesized via the co-assembly of basic amino acids (AAs) and heteropoly acids (HPAs) under acidic condition. The formation of gel-like...

scholarly journals Hydrogenation of Phenol to Cyclohexanone over Bifunctional Pd/C-Heteropoly Acid Catalyst in the Liquid Phase

2019 ◽  
Vol 149 (9) ◽  
pp. 2383-2389 ◽  
Author(s):  
Shiwei Liu ◽  
Jing Han ◽  
Qiong Wu ◽  
Bing Bian ◽  
Lu Li ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Heteropoly Acid ◽  
Acid Catalyst

Sensitive determination of psychotropic drugs in urine samples using continuous liquid-phase microextraction with an extraction solvent lighter than water

2018 ◽  
Vol 42 (6) ◽  
pp. 4450-4456 ◽  
Author(s):  
Lida Haghnazari ◽  
Hamid Nomani ◽  
Nazir Fattahi ◽  
Kiomars Sharafi ◽  
Masoud Moradi
Keyword(s):  
Liquid Phase ◽  
Psychotropic Drugs ◽  
Urine Samples ◽  
Liquid Phase Microextraction ◽  
Extraction Solvent ◽  
Sensitive Determination ◽  
First Time

A novel extraction vessel was employed, for the first time, in continuous liquid-phase microextraction (CLPME) with an extraction solvent lighter than water for the extraction of psychotropic drugs from urine samples.

Deep eutectic liquid organic salt as a new solvent for carrier-mediated hollow fiber liquid phase microextraction of lead from whole blood followed by electrothermal atomic absorption spectrometry

2017 ◽  
Vol 41 (15) ◽  
pp. 7038-7044 ◽  
Author(s):  
Leila Alavi ◽  
Shahram Seidi ◽  
Ali Jabbari ◽  
Tahmineh Baheri
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Whole Blood ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Organic Salt ◽  
Eutectic Liquid ◽  
Liquid Phase Microextraction ◽  
First Time

In the present work, for the first time, a new carrier-mediated hollow fiber liquid phase microextraction (CM-HFLPME) technique was applied for the determination of lead in whole blood samples by means of ETAAS.

VI. Researches on the colouring matters derived from coal-tar.— II. On aniline-blue

1864 ◽  
Vol 13 ◽  
pp. 9-14 ◽  
Keyword(s):  
High Temperature ◽  
Organic Acids ◽  
Industrial Production ◽  
Coal Tar ◽  
Aniline Blue ◽  
Benzoic Acids ◽  
First Time ◽  
Great Simplicity

Among the several stages which mark the development of the industry of coal-tar colours, the discovery of the transformation of aniliue-red into aniline-blue will always hold a prominent position. This transition, for the first time observed by MM. Girard and De Laire, two young French chemists of M. Pelouze’s Laboratory, and subsequently matured by M. Persoz, De Laynes, and Salvetat, has become the foundation of an enormous industrial production, which, having received a powerful impulse by MM. Renard Brothers and Franc in France, and more recently by Messrs. Simpson, Maule, and Nicholson in this country, has rapidly attained to proportions of colossal magnitude. The transformation of aniline-red into aniline-blue is accomplished by a process of great simplicity, and consists, briefly expressed, in the treatment at a high temperature of rosaniline with an excess of aniline. The mode of this treatment is by no means indifferent. Rosaniline itself cannot in this manner conveniently be converted into the blue colouring matter; the transformation is, however, easily accomplished by heating rosaniline salts with aniline, or, vice versâ , rosaniline with salts of aniline. Again, the nature of the acids with which the bases are combined is by no means without influence upon the result of the operation; manufacturers give a decided preference to organic acids, such as acetic or benzoic acids.

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