AU(III) AND CU(II) CATALYST FOR OXIDATION OF AROMATIC AND CYCLIC HYDROCARBON BY CERIUM (IV) IN ACIDIC MEDIUM UNDER MICROWAVE IRRADIATION

2016 ◽  
Vol 2 (4) ◽  
pp. 199
Author(s):  
Manish Srivastava ◽  
Ashu Goyal ◽  
Anamika Srivastava ◽  
Aakanksha Mishra ◽  
Preeti Tomar
Keyword(s):  
Acetic Acid ◽  
Microwave Irradiation ◽  
Carbonyl Compounds ◽  
Acidic Medium ◽  
Gold Catalyst ◽  
Solution Phase ◽  
Cyclic Hydrocarbon ◽  
Substrate Ratio

The addition of traces of Au(III) chloride with Ce(IV) sulphate (catalyst: substrate ratio (1: 80 to 1: 300)) and in case of  Cu(II) sulphate with Ce(IV) sulphate(catalyst: substrate ratio (1: 60 to 1: 250)) in solution phase under microwave irradiation resulted in good to excellent yields of corresponding to phenol, quinone and carbonyl compounds. In case of  oxidation of anthracene, phenanthrene, naphthalene, cyclohexane and toluene dissolved in acetic acid to give 95.02 %, 85.25%, 34.68%, 40.94%, and 56.54% yields in case of gold catalyst and 93.5%, 83.4%, 24.68%, 38.25% and 47.11% yields in case of copper as a catalyst.  Phenanthrene was oxidized in 9-Fluorenone instead of phenanthraquinone to get the benzylic rearrangement.

Racemization rates of 3,4-didehydro-2-amino acids

1989 ◽  
Vol 54 (12) ◽  
pp. 3381-3386 ◽  
Author(s):  
Libor Havlíček ◽  
Jan Hanuš ◽  
Jan Němeček
Keyword(s):  
Amino Acids ◽  
Acetic Acid ◽  
Acidic Medium

The racemization rates of amino acids in acidic medium (acetic acid) were studied. The sensitivity to racemization decreases in the order (E)-3,4-didehydroornithine > (E)-Nδ-Z-3,4-didehydroornithine >> (Z)-3,4-didehydronorvaline > ornithine, norvaline. (E)-3,4-Didehydroornithine is also relatively rapidly racemized on heating with 5 M or 0.05 M-HCl (100 °C).

Microwave Irradiated Acetylation of p-Anisidine: A Step towards Green Chemistry

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Mousumi Chakraborty ◽  
Vaishali Umrigar ◽  
Parimal A. Parikh
Keyword(s):  
Acetic Acid ◽  
Reaction Time ◽  
Green Chemistry ◽  
Acetic Anhydride ◽  
Microwave Irradiation ◽  
Organic Solvent ◽  
Reaction Times ◽  
Microwave Energy ◽  
Operating Parameters ◽  
Feed Composition

The present study aims at assessing the effect of microwave irradiation against thermal heat on the production of N-acetyl-p-anisidine by acetylation of p-anisidine. The acetylation of p-anisidine under microwave irradiation produces N-acetyl-p-anisidine in shorter reaction times, which offers a benefit to the laboratories as well as industries. It also eliminates the use of excess solvent. Effects of operating parameters such as reaction time, feed composition, and microwave energy and reaction temperature on selectivity to the desired product have been investigated. The results indicate as high as a 98% conversion of N-acetyl-p-anisidine can be achieved within 12-15 minutes using acetic acid. The use of acetic acid as an acetylating agent against conventionally used acetic anhydride eliminates the handling of explosive acetic anhydride and also the energy intensive distillation step for separation of acetic acid. Organic solvent like acetic anhydride are not only hazardous to the environment, they are also expensive and flammable.

scholarly journals Oxidation of Aliphatic Secondary and Benzylic Alcohols to Carbonyl Compounds by Peracetic Acid in the Presence of Sodium Bromide in Acetic Acid

1987 ◽  
Vol 60 (11) ◽  
pp. 4143-4144 ◽  
Author(s):  
Takashi Morimoto ◽  
Masao Hirano ◽  
Hiroyuki Ashiya ◽  
Hidetaka Egashira ◽  
Xiumin Zhuang
Keyword(s):  
Acetic Acid ◽  
Peracetic Acid ◽  
Carbonyl Compounds ◽  
Sodium Bromide ◽  
Benzylic Alcohols

ChemInform Abstract: A Selective Solvent-Free Self-Condensation of Carbonyl Compounds Utilizing Microwave Irradiation.

ChemInform ◽  
2011 ◽  
Vol 42 (43) ◽  
pp. no-no
Author(s):  
Lalit Kumar Sharma ◽  
Kyung Bo Kim ◽  
Gregory I. Elliott
Keyword(s):  
Microwave Irradiation ◽  
Carbonyl Compounds ◽  
Solvent Free ◽  
Selective Solvent

ChemInform Abstract: Regeneration of Carbonyl Compounds from Oximes under Microwave Irradiation in Solventless System.

ChemInform ◽  
2010 ◽  
Vol 31 (34) ◽  
pp. no-no
Author(s):  
Majid M. Heravi ◽  
Dariush Ajami ◽  
Rahim Hekmatshoar ◽  
Yahya Sh. Beheshtiha ◽  
Karim Assadollah ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Carbonyl Compounds

Accelerated Reduction of Carbonyl Compounds under Microwave Irradiation

1997 ◽  
Vol 38 (17) ◽  
pp. 2959-2960 ◽  
Author(s):  
Didier Barbry* ◽  
Séverine Torchy
Keyword(s):  
Microwave Irradiation ◽  
Carbonyl Compounds

scholarly journals An Eco-Friendly System for Oximation of Organic Carbonyl Compounds Under Microwave Irradiation

2014 ◽  
Vol 30 (2) ◽  
pp. 699-703 ◽  
Author(s):  
Hana Batmani ◽  
Davood Setamdideh
Keyword(s):  
Microwave Irradiation ◽  
Carbonyl Compounds

scholarly journals A microwave-catalyzed rapid, efficient and ecofriendly synthesis of substituted pyrazol-5-ones (Short communication)

2003 ◽  
Vol 68 (10) ◽  
pp. 723-727 ◽  
Author(s):  
Vijay Dabholkar ◽  
Rahul Gavande
Keyword(s):  
Acetic Acid ◽  
Carboxylic Acid ◽  
Microwave Irradiation ◽  
Reaction Rate ◽  
Short Communication ◽  
Acid Hydrazide ◽  
Acetoacetic Ester ◽  
Carboxylic Acid Hydrazide ◽  
Conventional Methods

A series of 1-(3,4-dihydro-3-oxo-2H-1,4-benzoxazine-2-carbonyl)-3-methyl-4-(substituted phenylhydrazono)-2-pyrazolin-5-ones have been synthesized by the reaction of 2H-3,4-dihydro-3-oxo-1,4-benzoxazine-2-carboxylic acid hydrazide with substituted acetoacetic ester derivatives using acetic acid as solvent under microwave irradiation (MWI), as well as by conventional methods. The reaction rate is enhanced tremendously and the yields are improved under MWI as compared to conventional methods.

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