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C. S. Venkatachalam

Bio: C. S. Venkatachalam is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Aryl & Polarography. The author has an hindex of 5, co-authored 30 publications receiving 78 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a facile ring cleavage reaction yielding 2(α-alkoxy-allyl)phenols which are not easily accessible is described, leading to the development of a new class of 4-alkox-3-bromochromans.
Abstract: Electrochemical reduction of 4-alkoxy-3-bromochromans in acetonitrile led to a facile ring cleavage reaction yielding 2(α-alkoxy- allyl)phenols which are not easily accessible.
Journal ArticleDOI
TL;DR: In this paper, a complex mechanism has been suggested for the electroreduction of 4-chloro-1-naphthylhydrazonodimedone (4-Cl 1-NHD), 4-Sulpho 1-nphylhydramine (1-NHP-4-SO3H) and 2-hydroxy 4-sulphoencyl hydride (2-SH 0.1 M TEAI-DMSO) using various electrochemical techniques.
Abstract: Studies on the electroreduction of 4-chloro-1-naphthylhydrazonodimedone (4-Cl-1-NHD), 4-sulpho-1-naphthylhydrazonodimedone (1-NHD-4-SO3H) and 2-hydroxy-4-sulpho-1-naphthylhydrazonodimedone (2-OH-1-NHD-4-SO3H) have been carried out in 0.1 M TEAI-DMSO using various electrochemical techniques. Each depolariser exhibits three polarographic dc waves, ac peaks or CV peaks, respectively, the nature of which have been discussed. Further, from the results of microcoulometry and macroscale cpe. a complex mechanism has been suggested for the electroreduction of these hydrazones. The mechanism has been supported by in-situ EPR measurements, evaluations of the charge-transfer rate constants and chromatographic analysis (by TLC and HPLC) on the products of macroscale cpe.
Journal ArticleDOI
TL;DR: The controlledpotential 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 as mentioned in this paper.
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.
DOI
01 Dec 1989
TL;DR: The electrochemical study of β-chlorovinylaldehydes was carried out in DMF in the presence of 0·1 M NBu4ClO4 as the supporting electrolyte as mentioned in this paper.
Abstract: The electrochemical study of β-chlorovinylaldehydes, namely, 4-chloro-3-formyl-2H (1)-benzopyran and β-chlorocinnamaldehyde was carried out in DMF in the presence of 0·1 M NBu4ClO4 as the supporting electrolyte. Both the depolarizers give three diffusionlimited polarographic waves and the corresponding cathodic peaks in cyclic voltammetry. Their microcoulometric data indicate a transfer of four-electrons (n app=4) in the electrode process. The macroscale controlled-potential electrolysis of the depolarizers afforded only blackish-brown tarry product. A mechanism is suggested for their reduction in DMF under polarographic conditions.

Cited by
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Journal ArticleDOI
TL;DR: In this paper, the status of research on the dynamics of electrochemical reactions is reviewed, including the electrodissolution of metals, cathodic deposition, and electrocatalytic reactions.

323 citations

Journal ArticleDOI
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.

298 citations

Journal ArticleDOI
TL;DR: In this article, 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).

99 citations

Journal ArticleDOI
R K Dieter1, H Yu
TL;DR: In this article, Palladium-catalyzed cyclization of α-amino allenes affords either the pyrroline or pyrrole depending on reaction conditions and provides for introduction of an aryl substituent at the C-3 position of the α-amerino allene.

90 citations