Indian Journal of Chemistry: Sec B- Organic Chemistry including Medicinal Chemistry

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Published by: NISCAIR (CSIR)

Subjects: Chemistry

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.

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Editor,
Dr. P Paravatharajan
email: prema@niscair.res.in


ISSN No. :    0376-4699
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Synthesis and characterization of azoxy based mesogenic diols
Title: Synthesis and characterization of azoxy based mesogenic diols

Authors: Mulani, Khudbudin B; Ganjave, Nitin V; Chavan, Nayaku N

Abstract:   Azoxy based rigid mesogenic diols have been synthesized using two steps. Phenol/cresol is used as starting material. Synthesized diols are characterized by IR, 1H and 13C NMR, and mass spectroscopic methods. Thermal properties have been determined by thermo gravimetric analysis method and crystallinity patterns have been obtained by wide angle X-ray diffractogram. Substituted phenol (methyl) is used to study the effect of substitution on physical and thermal properties of rigid azoxy mesogenic diol. The detailed characterization of azoxy based rigid diols is reported in this communication, which is highly useful for fundamental and applied research, particularly in liquid crystals and liquid crystalline polymers. The experimental results reveal that phenol based rigid mesogenic diols have high thermal stability and degree of crystallinity than methyl substituted rigid mesogenic diols.

Page(s): 359-362

Synthesis of aryl β-ketoesters by opening of aryl epoxides with ethyl diazoacetate catalyzed by BF3OEt2
Title: Synthesis of aryl β-ketoesters by opening of aryl epoxides with ethyl diazoacetate catalyzed by BF3OEt2

Authors: Rao, D Chandra; Reddy, D Kumar; Shekhar, V; Chinababu, B; Rao, Ch Bhujanga; Venkateswarlu, Y

Abstract: A facile synthesis of 4-aryl substituted β-ketoesters from the reaction aryl epoxides with ethyl diazoacetate, in presence of BF3OEt2 has been described with excellent yields.

Page(s): 356-358

Synthesis of some 2-[2,4'-dioxo-spiroindole-3,2'-thiazolidin-3'-yl] alkanoic acid/3-substituted indolo[2,3-b]oxazin-2-ones and 3-substituted arylidene indolo[2,3-b]oxazin-2-ones as fungicides
Title: Synthesis of some 2-[2,4'-dioxo-spiroindole-3,2'-thiazolidin-3'-yl] alkanoic acid/3-substituted indolo[2,3-b]oxazin-2-ones and 3-substituted arylidene indolo[2,3-b]oxazin-2-ones as fungicides

Authors: Tiwari, Shailendra; Ahamad, Akeel; Alauddin, Shafqat

Abstract: Several 2-[2,4'-dioxo-spiro indole-3,2'-thiazolidin-3'-yl] alkanoic acids 3-substituted indolo[2,3-b]-oxazin-2-ones and 3-substituted arylidene indolo [2,3-b]-oxazin-2-ones have been synthesised from a common intermediate, in good yield. These compounds have been screened for their fungicidal activity against Pyricularia oryzae, Pseudoperonospora cubensis, Sphaerotheca fuliginea and Phytophthora infestans. Some of the synthesized compounds have been found to have activity which is comparable with the standard drug carbendazim.

Page(s): 352-355

One pot synthesis of fused chromeno-pyrano-pyrimidines and evaluation of their antimicrobial activity
Title: One pot synthesis of fused chromeno-pyrano-pyrimidines and evaluation of their antimicrobial activity

Authors: Prasad, J Venkata; Kumar, N Ravi; Solomon, K Anand; Nilaventhan, K R S Sudar; Lowrence, Rene Christene; Saisubramanian, N; Gopikrishna, G

Abstract: An efficient synthesis of novel fused chromeno-pyrano-pyrimidines 6a-j has been achieved by a mild sodium acetate catalyzed one pot sequential multi-component reaction. All the compounds have been isolated as pure products from the reaction mixture in good yield. The synthesized compounds have been evaluated for their antimicrobial activity against gram negative E. coli strain wherein compounds 6b, 6c and 6f display noteworthy antimicrobial activity. Minimum inhibitory concentrations of the compounds are reported.

Page(s): 345-351

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