Halogenation of Carbonyl Compounds by an Ionic Liquid, [AcMIm]X, and Ceric Ammonium Nitrate (CAN)

2007 ◽  
Vol 60 (5) ◽  
pp. 358 ◽  
Author(s):  
Brindaban C. Ranu ◽  
Laksmikanta Adak ◽  
Subhash Banerjee
Keyword(s):  
Ionic Liquid ◽  
Organic Solvent ◽  
Ammonium Nitrate ◽  
Carbonyl Compounds ◽  
Reaction Medium ◽  
Ceric Ammonium Nitrate ◽  
Radical Mechanism ◽  
Keto Esters

An ionic liquid, acetylmethylimidazolium halide ([AcMIm]X), in combination with ceric ammonium nitrate promotes halogenations of a wide variety of ketones and 1,3-keto esters at the α-position. The ionic liquid acts here as reagent as well as reaction medium, and thus the reaction does not require any organic solvent or conventional halogenating agent. The reaction is completely arrested when the radical quencher TEMPO is used. A plausible radical mechanism is also suggested.

Halogenation of Carbonyl Compounds by an Ionic Liquid, [AcMIm]X, and Ceric Ammonium Nitrate (CAN).

ChemInform ◽  
2007 ◽  
Vol 38 (43) ◽  
Author(s):  
Brindaban C. Ranu ◽  
Laksmikanta Adak ◽  
Subhash Banerjee
Keyword(s):  
Ionic Liquid ◽  
Ammonium Nitrate ◽  
Carbonyl Compounds ◽  
Ceric Ammonium Nitrate

Ceric-induced grafting of acrylonitrile onto sodium alginate: kinetics and mechanism and effects of the reaction medium

1994 ◽  
Vol 6 (3) ◽  
pp. 193-200 ◽  
Author(s):  
S B Shah ◽  
C P Patel ◽  
H C Trivedi
Keyword(s):  
Free Radical ◽  
Ammonium Nitrate ◽  
Sodium Alginate ◽  
Graft Copolymerization ◽  
Mixed Solvents ◽  
Reaction Medium ◽  
Kinetic Scheme ◽  
Water Systems ◽  
Ceric Ammonium Nitrate ◽  
Good Agreement

The kinetic scheme of free radical graft copolymerization of acrylonitrile (AN) onto sodium alginate, using ceric ammonium nitrate as an initiator, has been proposed and equations relating the values of Rp, Rr and Rh are also suggested. The results have been found to be in good agreement with the proposed mechanism. The per cent grafting of AN onto sodium alginate has also been determined as a function of composition of the mixed solvents comprising methanol: water, ethanol: water, n-propanol:water and n-butanol: water systems. The reaction medium has been found to play an important role in graft copolymerization. The results of the effect of the reaction medium on grafting are also discussed.

Microwave assisted Convenient and Facile Regeneration of Carbonyl Compounds from Oximes, Semicarbazones and Phenylhydrazones using Silica Supported Ceric Ammonium Nitrate1

2002 ◽  
Vol 2002 (11) ◽  
pp. 556-557 ◽  
Author(s):  
K.V.N.S. Srinivas ◽  
Biswanath Das
Keyword(s):  
Ammonium Nitrate ◽  
Carbonyl Compounds ◽  
Ceric Ammonium Nitrate ◽  
Microwave Assisted ◽  
Efficient Regeneration

Microwave assisted efficient regeneration of carbonyl compounds from the corresponding oximes, semicarbazones and phenylhydrazones has been developed by using silica supported ceric ammonium nitrate.

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