Polyethylene Glycols as Efficient Catalysts for the Oxidation of Bicyclic Monoterpenes by Ceric Ammonium Nitrate in Acetonitrile under Acid-Free Conditions: Kinetic and Mechanistic Approach

2018 ◽  
Vol 50 (6) ◽  
pp. 383-396 ◽  
Author(s):  
N. Rajitha ◽  
S. Shylaja ◽  
K. C. Rajanna ◽  
B. Yadagiri
Keyword(s):  
Ammonium Nitrate ◽  
Ceric Ammonium Nitrate ◽  
Polyethylene Glycols ◽  
Mechanistic Approach

scholarly journals Polyethylene Glycols as Efficient Media for Decarboxylative Nitration of α,β-Unsaturated Aromatic Carboxylic Acids by Ceric Ammonium Nitrate in Acetonitrile Medium: A Kinetic and Mechanistic Study

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
K. Ramesh ◽  
S. Shylaja ◽  
K. C. Rajanna ◽  
P. Giridhar Reddy ◽  
P. K. Saiprakash
Keyword(s):  
Ammonium Nitrate ◽  
Carboxylic Acids ◽  
Reaction Times ◽  
Ceric Ammonium Nitrate ◽  
Polyethylene Glycols ◽  
Mechanistic Study ◽  
Aromatic Carboxylic Acids ◽  
Detailed Kinetics ◽  
Kinetics Of ◽  
Acetonitrile Medium

Polyethylene glycols (PEGs) were found to be efficient media for decarboxylative nitration of α,β-unsaturated aromatic carboxylic acids by ceric ammonium nitrate (CAN) in acetonitrile to give β-nitrostyrene derivatives. Kinetics of the reaction exhibited second order kinetics with a first order dependence on [CAN] and [substrate]. Reactions were too sluggish to be studied in the absence of PEG; therefore detailed kinetics were not taken up. Reaction times were reduced from 24 hrs to few hours. The catalytic activity was found to be in the increasing order PEG-300 > PEG-400 > PEG-600 > PEG-200. Mechanism of PEG-mediated reactions was explained by Menger-Portnoy's scheme as applied in micellar kinetics.

scholarly journals Polyethylene Glycols as Efficient Catalysts for the Oxidation of Xanthine Alkaloids by Ceric Ammonium Nitrate in Acetonitrile: A Kinetic and Mechanistic Approach

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
S. Shylaja ◽  
K. C. Rajanna ◽  
K. Ramesh ◽  
K. Rajendar Reddy ◽  
P. Giridhar Reddy
Keyword(s):  
Ammonium Nitrate ◽  
Elevated Temperatures ◽  
Ceric Ammonium Nitrate ◽  
Kinetics Of Oxidation ◽  
First Order ◽  
First Order Kinetics ◽  
Mechanistic Approach ◽  
Enzymatic Model ◽  
Poly Ethylene ◽  
Kinetics Of

Kinetics of oxidation of xanthine alkaloids, such as Xanthine (XAN), hypoxanthine (HXAN), caffeine (CAF), theophylline (TPL), and theobromine (TBR), have been studied with ceric ammonium nitrate (CAN) using poly ethylene glycols (PEG) as catalysts. Reaction obeyed first order kinetics in both [CAN] and [Xanthine alkaloid]. Highly sluggish CAN-xanthine alkaloid reactions (in acetonitrile media even at elevated temperatures) are enhanced in presence PEGs (PEG-200, -300, -400, -600). An increase in [PEG] increased the rate of oxidation linearly. This observation coupled with a change in absorption of CAN in presence of PEG, [H–(OCH2–CH2)n–O–NH4Ce(NO3)4(CH3CN)] (PEG bound CAN species), is considered to be more reactive than CAN. The mechanism of oxidation in PEG media has been explained by Menger-Portnoy’s enzymatic model.

ChemInform Abstract: Oxidation of 4-methoxyanilines to 1,4-Benzoquinones Using Ceric Ammonium Nitrate (CAN).

ChemInform ◽  
2011 ◽  
Vol 42 (15) ◽  
pp. no-no
Author(s):  
Yugang Chen ◽  
Weijiang Ying ◽  
Michael Harmata
Keyword(s):  
Ammonium Nitrate ◽  
Ceric Ammonium Nitrate

OXIDATIVE REMOVAL OFN-(p-METHOXYBENZYL) GROUP ON DIKETOPIPERAZINE SKELETON WITH CERIC AMMONIUM NITRATE

1983 ◽  
Vol 12 (7) ◽  
pp. 1001-1002 ◽  
Author(s):  
Juji Yoshimura ◽  
Masanori Yamaura ◽  
Tsuneji Suzuki ◽  
Hironobu Hashimoto
Keyword(s):  
Ammonium Nitrate ◽  
Ceric Ammonium Nitrate ◽  
Oxidative Removal

scholarly journals Synthesis of 4,7-indolequinones. The oxidative demethylation of 4,7-dimethoxyindoles with ceric ammonium nitrate.

1985 ◽  
Vol 33 (5) ◽  
pp. 2122-2128 ◽  
Author(s):  
YOSHIYASU KITAHARA ◽  
SHINSUKE NAKAHARA ◽  
RYUICHI NUMATA ◽  
AKINORI KUBO
Keyword(s):  
Ammonium Nitrate ◽  
Ceric Ammonium Nitrate ◽  
Oxidative Demethylation

Deprotection of benzaldehyde diacetates by ceric ammonium nitrate coated on silica

1992 ◽  
Vol 33 (27) ◽  
pp. 3855-3858 ◽  
Author(s):  
Philippe Cotelle ◽  
Jean-Pierre Catteau
Keyword(s):  
Ammonium Nitrate ◽  
Ceric Ammonium Nitrate

On the mechanism of alcoholysis of allylic and benzylic alcohols and of epoxides in the presence of ceric ammonium nitrate

Tetrahedron ◽  
1996 ◽  
Vol 52 (12) ◽  
pp. 4175-4180 ◽  
Author(s):  
Jean-Marc Chapuzet ◽  
Sophie Beauchemin ◽  
Benoit Daoust ◽  
Jean Lessard
Keyword(s):  
Ammonium Nitrate ◽  
Ceric Ammonium Nitrate ◽  
Benzylic Alcohols
Sign in / Sign up

Export Citation Format

Share Document