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.

Contact

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


ISSN No. :    0376-4699
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A new embelin from the mangrove Aegiceras corniculatum
Title: A new embelin from the mangrove Aegiceras corniculatum

Authors: Thota, Satya Prakasa Rao; Sarma, Nittala S; Murthy, Y L N

Abstract: One new compound (2) and five known compounds (1, 3-6) have been isolated from the mangrove plant Aegiceras corniculatum collected from the Godavari mangrove forest, India. The structure of the new compound has been established by 1H and 13C NMR spectroscopy and mass spectral data as 2,5-didehydroxy-6-methylembelin (2). The known compounds have been characterized as 4-hydroxy-2-methoxybenzamide (1), embelin (3), 5-O-ethylembelin (4), 5-O-methylembelin (5) and 4-methoxyresorcinol (6). Compounds 2-5 exhibit moderate antimalarial activity. Embelin (3) shows activity against chloroquine-resistant strains better than against chloroquine-sensitive strains of Plasmodium falciparum.

Page(s): 123-127

Taraxerane-type triterpenoids from Portulaca oleracea Linn. seeds
Title: Taraxerane-type triterpenoids from Portulaca oleracea Linn. seeds

Authors: Mir, Showkat R; Ali, Mohammed

Abstract: Analysis of the methanolic extract of seeds of Portulaca oleracea results in the isolation of taraxerane-type triterpenoids, viz., taraxerol 1, acetyl aleuritolic acid 2, portaraxeroic acid A (olean-14-en-3β-yl acetoxy-23-oic acid) 3 and portaraxeroic acid B (olean-14-en-3β-yl acetoxy-30-oic acid) 4. The structures of compounds have been determined on the basis of detailed spectroscopic analysis. The significance of their occurrence in P. oleracea is discussed from the biosynthetic viewpoint.

Page(s): 119-122

A new cyclopentane derivative from Ficus pomifera Wall. and Curcuma leucorrhiza Roxb.
Title: A new cyclopentane derivative from Ficus pomifera Wall. and Curcuma leucorrhiza Roxb.

Authors: Wangkheirakpam, Sujata D; Asem, Satyavama D; Radhapiyari, Wangkheirakpam; Singh, Chingakham B; Yumnam, Rajkumar S; Laitonjam, Warjeet S

Abstract: Two new compounds 1 and 2 have been isolated along with a known compound 3 from both Ficus pomifera Wall and Curcuma leucorrhiza Roxb. The compound 1 is a cyclopentane derivative, 5-(3,4,5,6-tetrahydroxyhexan-2-ylidene)cyclopentane-1,2,3,4-tetraol; compound 2 is a natural polymer compound and compound 3 is β-sitosterol glucoside. The similarity of compound 1 has been studied by Reversed Phase-High Performance Liquid Chromatography (RP-HPLC). The compounds 2 and 3 have further been identified by comparison with spectral data. The compound 1 has been tested for anti-microbial and antioxidant activities. The isolation of compound 1, 2 and 3 have been reported from different plants of different families-Moraceae and Zingiberaceae for the first time.

Page(s): 114-118

Henry reaction catalyzed by recyclable [C4dabco]OH ionic liquid
Title: Henry reaction catalyzed by recyclable [C4dabco]OH ionic liquid

Authors: Keithellakpam, Sanjoy; Laitonjam, Warjeet S

Abstract: DABCO-based ionic liquid, 1-butyl-4-aza-1-azaniabicyclo[2.2.2]octane hydroxide, has been used as an efficient catalyst for Henry reaction of various carbonyl compounds with nitroalkanes affording very high yields within a short duration. This method is very simple, clean and avoids hazardous organic solvents. The catalyst can be easily recovered and recycled several times.

Page(s): 110-113

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