Published by: NISCAIR (CSIR)
Indian Journal of Chemistry (Section B) is published by the National Institute of Science Communication and Information Resources (NISCAIR)-CSIR, New Delhi. This journal publishes articles in Organic and Medicinal Chemistry. It includes full length papers, notes and communications and short reviews. The monthly issues covers articles in organic reaction mechanism, theoretical organic chemistry, structure-activity relationships, medicinal chemistry, synthesis of chiral compounds, bio-organic chemistry, enzymes in organic synthesis, reagents in organic synthesis, heterocyclic compounds, phytochemistry (natural products), amino acids, peptides and proteins, spectroscopy in characterization of organic compounds, chemoenzymatic and enantioselective synthesis of organic compounds, synthesis of fullerenes, metal-catalyzed asymmetric reactions, bioactive plant products and combinatorial chemistry.
Dr. P Paravatharajan
ISSN No. : 0376-4699
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Ab initio investigation of electrophilic addition of chlorine to norbornadiene
Title: Ab initio investigation of electrophilic addition of chlorine to norbornadiene
Authors: Abbasoglu, Rza
Abstract: Full geometry optimization of norbornadiene
(NB) has been done by ab initio HF/3-21G*,
HF/3-21G**, HF/6-31 G*, HF/6-311G* and HF/6-311G* methods and the structure of the
molecule is investigated. The double bonds of molecule are endo pyramidalized.
The electron densities (qi, HOMO) on exo and endo
faces of the double bonds are not equal and it is bigger on the exo face.
The NB-Cl2 system is investigated by HF/3-21G* method and the stable
determined. The stable configurations of
the NB-Cl2 system correspond to NB ... Cl2 (exo)
and NB.... Cl2 (endo) molecular complexes that are
formed by the exo and endo orientation
molecule to the double bond of NB, respectively. The exo-molecular complex
has been found to be relatively more stable than the endo-complex. The
cationic intermediates of the reaction have been studied by ab initio methods.
The exo-chloronium cation is found to be more stable than endo- chloronium
cation. The exo-facial selectivity should be observed in the addition reaction
to NB of chlorine. The results obtained indicate that a multi center nonclassical
chlorocarbonium cation formed by the rearrangement of exo-chloronium cation
is the most stable one among the cationic intermediates. It is likely that the ionic
addition reaction proceeds via the nonclassical chlorocarbonium ion and results
in the formation of the rearranged products. The mechanism of the addition reaction
is also discussed.
Anti-tubercular, antioxidant and in vitro anti-inflammatory activity of some newly synthesized chalcones
Title: Anti-tubercular, antioxidant and in vitro anti-inflammatory activity of some newly synthesized chalcones
Authors: Alam, Shadab; Panda, Rakesh; Kachroo, Monica
Abstract: A series of
chalcones of 4-acetyl pyridines and substituted aryl aldehydes have been
synthesized and evaluated for antitubercular, antioxidant and anti-inflammatory
activity. The structures of the synthesized compounds have been confirmed by
IR, 1H and 13C NMR spectroscopy and CHN analysis. The new
compounds have been evaluated for antitubercular activity against
Mycobacterium tuberculosis H37
Rv using MABA method. In vitro anti-inflammatory
activity has been performed by using bovine serum albumin assay method with
diclofenac as standard and antioxidant activity by DPPH method.
Acylation of diselenides and disulfides with N-acylbenzotriazoles promoted by SmI2
Title: Acylation of diselenides and disulfides with N-acylbenzotriazoles promoted by SmI2
Authors: Tu, Ya Wei; Zhou, Lie Jin; Lv, Xin; Wang, Xiao Xia
Abstract: The acylation of diselenides or disulfides with N-acylbenzo-triazoles mediated by SmI2
has been achieved successfully without the presence of HMPA, and the
corresponding selenolesters or thioesters have been prepared in good yields.
A simple process for the preparation of pralidoxime chloride
Title: A simple process for the preparation of pralidoxime chloride
Authors: Unnisa, Lateef; Sumakanth, M; Rao, B Leelamaheswara; Divi, Murali Krishnaprasad; Rao, Mysore Aswathanarayana
chloride (2-PAM chloride) is an important drug included in National List of
Essential Medicines-2003 for treating pesticide poisoning. However, the current
methods for its preparation use hazardous methyl halides such as methyl
chloride or methyl iodide. In the present work, reaction of pyridine-2-aldoxime
with methyl methanesulfonate in acetonitrile gave
2-PAM mesylate in high yields (90%). Use of methyl tosylate in toluene resulted
in 2-PAM tosylate (90% yield). Both 2-PAM mesylate and 2-PAM tosylate on
treatment with dry hydrogen chloride in isopropanol, resulted in 2-PAM chloride
in high yields (90%) and purity (>99%).
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