C. S. Venkatachalam
Bio: C. S. Venkatachalam is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topic(s): Aryl & Polarography. The author has an hindex of 5, co-authored 30 publication(s) receiving 78 citation(s).
Abstract: N -propargylanilines, under one-pot homologation conditions, undergo an in situ cyclisation catalysed by Cu(I) to yield 3-pyrrolines in good yield.
Abstract: Photolysis of 4-chloro-3-(N-Aryliminomethyl) (2H)benzopyrans and benzothiopyrans, 1a - g , yielded the respective quinolides 3a - g .
Abstract: The electrochemical reduction of 2-nitrobenzidine (I) has been investigated in N,N-dimethylformamide solutions. Two well-defined polarographic waves in the ratio 1:3 were obtained. The first wave was found to be a reversible, diffusion-controlled, single electron wave while the second was the result of a diffusion-controlled, irreversible, three-electron process with chemical complications. The nitro and nitroso anion radical intermediates of I formed during the CPE experiments were detected by an ESR technique and confirmed later by cyclic voltammetry. The “current oscillations” observed in the cyclic voltammograms of I are discussed. An eece-type of sequence is suggested for I reduction leading to the formation of 2-hydroxylaminobenzidine.
Abstract: The controlled-potential electrolysis of various substituted bromo epoxides in acetonitrile at a mercury pool electrode led to selective reduction of the carbonbromine bond affording the respective epoxide products in 80–90% yield.
Abstract: The controlled-potential electrolyses of various substituted chlorovinylimines, viz., 4-chloro-3-(N-aryliminomethyl)-2H(1)-benzopyrans in dimethylformamide(DMF) solutions at mercury pool electrode yielded selectively the corresponding chlorine reduced products in moderately good yields.
Abstract: We review here the status of research on the dynamics of electrochemical reactions. The electrodissolution of metals, cathodic deposition, and electrocatalytic reactions are discussed. We treat dynamic behavior such as periodic oscillations, bifurcations, chaos, and spatial patterns and also the status of mechanisms and mathematical models, which explain the dynamics.
TL;DR: The different synthetic approaches to synthesize propargylamines, such as A3 couplings and C-H functionalization of alkynes, have been described and organized on the basis of the catalysts employed in the syntheses.
Abstract: Propargylamines are a versatile class of compounds which find broad application in many fields of chemistry. This review aims to describe the different strategies developed so far for the synthesis of propargylamines and their derivatives as well as to highlight their reactivity and use as building blocks in the synthesis of chemically relevant organic compounds. In the first part of the review, the different synthetic approaches to synthesize propargylamines, such as A3 couplings and C–H functionalization of alkynes, have been described and organized on the basis of the catalysts employed in the syntheses. Both racemic and enantioselective approaches have been reported. In the second part, an overview of the transformations of propargylamines into heterocyclic compounds such as pyrroles, pyridines, thiazoles, and oxazoles, as well as other relevant organic derivatives, is presented.
Abstract: The inhibition of Cu 2+ , Cd 2+ and Zn 2+ discharge reactions was studied in the presence of C 4 –C 6 alcohols, phenol, benzyl alcohol and cyclohexanol (SAS) in 0.5 M Na 2 SO 4 + 1 mM H 2 SO 4 supporting electrolyte. It is found from the results that at high surface coverages by SAS, the inhibition is due to “sieve effect” which is different from that at low coverages. The true standard rate constant is proportional to exp[(− N Δγ A i )/( RT )] where Δγ A i is the extra energy (in the form of work) that must be done in order to create a free area required for a discharge reaction.
Abstract: Alpha-amino allenes, readily prepared from reaction of alpha-(N-carbamoyl)alkylcuprates with propargyl substrates followed by N-Boc deprotection, are converted in high yields to pyrrolines with AgNO(3). Palladium-catalyzed cyclization of amino allenes affords either the pyrroline or the pyrrole depending on reaction conditions and provides for introduction of an aryl substituent at the C-3 position of the pyrroline or pyrrole. Enantioenriched pyrrolines are readily prepared from scalemic propargyl alcohols. [reaction: see text]
Author's H-index: 5