Showing papers by "Subbarayappa Adimurthy published in 2011"
TL;DR: In this paper, the copper-catalyzed direct synthesis of imines from amines under mild aerobic conditions is described, which is applicable for the synthesis of various amines from corresponding amines such as benzylic, aliphatic, cyclic secondary, heteroaromatic species and the oxidative condensation of benzylamines with anilines.
Abstract: The copper (I)-catalyzed direct synthesis of imines from amines under mild aerobic conditions is described. The method is applicable for the synthesis of various imines from corresponding amines such as benzylic, aliphatic, cyclic secondary, heteroaromatic species and the oxidative condensation of benzylamines with anilines extends the scope of the CuCl catalytic system. Noteworthy, solvent-free procedure, air as a benign oxidant, and the cheap and easy availability of the catalyst are the vital advantages of the method.
206 citations
TL;DR: The in-situ acid activation of a bromide–bromate couple generates the reactive species BrOH, and it is proved to be an efficient for the bromination of various heterocycles under mild aqueous conditions without the use of any catalyst.
Abstract: Selective monobromination of aromatic heterocyclic compounds through in-situ acid activation of 2:1 bromide/bromate couple as a benign brominating reagent is described. The in-situ acid activation of a bromide–bromate couple generates the reactive species BrOH, and it is proved to be an efficient for the bromination of various heterocycles under mild aqueous conditions without the use of any catalyst. Heterocycles that had electron-rich substituents provided good yields.
18 citations
TL;DR: In this article, the synthesis of benzyl alkyl ethers from benzyl bromides and alcohols using FeSO4 as a recoverable and reusable mediator has been described without use of base and cosolvent under mild conditions.
16 citations
TL;DR: In this paper, microwave assisted rapid synthesis of highly substituted imidazo[ 1,2-a]pyridine derivatives by reaction of aminopyridines and α-bromo-β-keto esters under solvent-free conditions is described.
Abstract: Thermal and microwave-assisted rapid syntheses of highly substituted imidazo[ 1,2-a]pyridine derivatives by reaction of aminopyridines and α-bromo-β-keto esters under solvent-free conditions are described. Reactions carried out under microwave irradiation give the highest yields of products in reaction times of less than two minutes.
14 citations
TL;DR: Iodine and InCl3-catalyzed facile syntheses of 1,5- and 1,8-naphthyridines from 3-aminopyridine and 2-amino acid were described in this paper.
9 citations
8 citations
TL;DR: In this article, the facile and selective conversion of benzylic bromides to benzaldehydes using H2O2 as a benign oxidizing agent in an aqueous medium is described.
6 citations
TL;DR: In this article, the conversion of vic-1,2 dibromides to α-bromoketones and epoxides using H 2 O 2 /dioxane and NaOH/water respectively under mild conditions has been described.
Abstract: The conversion of vic-1,2 dibromides to α-bromoketones and epoxides using H 2 O 2 /dioxane and NaOH/water respectively under mild conditions has been described.
TL;DR: In this paper, the synthesis of benzyl alkyl ethers from benzyl bromides and alcohols using FeSO4 as a recoverable and reusable mediator has been described without use of base and cosolvent under mild conditions.
Abstract: The synthesis of benzyl alkyl ethers from benzyl bromides and alcohols using FeSO4 as a recoverable and reusable mediator has been described without use of base and cosolvent under mild conditions.
TL;DR: In this article, the copper-catalyzed direct synthesis of imines from amines under mild aerobic conditions is described, which is applicable for the synthesis of various amines from corresponding amines such as benzylic, aliphatic, cyclic secondary, heteroaromatic species and the oxidative condensation of benzylamines with anilines.
Abstract: The copper (I)-catalyzed direct synthesis of imines from amines under mild aerobic conditions is described. The method is applicable for the synthesis of various imines from corresponding amines such as benzylic, aliphatic, cyclic secondary, heteroaromatic species and the oxidative condensation of benzylamines with anilines extends the scope of the CuCl catalytic system. Noteworthy, solvent-free procedure, air as a benign oxidant, and the cheap and easy availability of the catalyst are the vital advantages of the method.
TL;DR: In this paper, the reaction conditions were optimized concerning catalyst amount, solvent, and temperature and the scope of the arylation was explored, where the authors explored the effect of different reaction conditions on the performance.
Abstract: The reaction conditions are optimized concerning catalyst amount, solvent, and temperature and the scope of the arylation is explored.
TL;DR: In this paper, high efficient and regioselective methods for the synthesis of 1,5 and 1,8-naphthyridines (II and V) catalyzed by I2 and InCl3, resp., were developed.
Abstract: Highly efficient and regioselective methods for the synthesis of 1,5- and 1,8-naphthyridines (II), (V) catalyzed by I2 and InCl3, resp., are developed.
TL;DR: An efficient and convenient procedure for the oxidation of methylarenes to the corresponding benzoic acids using a bromide/bromate-based reagent system in water was developed in this article.
Abstract: An efficient and convenient procedure has been developed for the oxidation of methylarenes to the corresponding benzoic acids using a bromide/bromate-based reagent system in water. Regeneration and reusability of the bromide/bromate reagent is demonstrated.