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Showing papers by "Kirpal S. Bisht published in 1995"

Journal Article•DOI•
Neolignans and a lignan from Piper clarkii

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Ashok K. Prasad1, O. D. Tyagi1, Jesper Wengel1, Per M. Boll1, Carl Erik Olsen, Kirpal S. Bisht, Amarjit Singh2, Antaryami Sarangi2, Ravinder Kumar2, Subhash C. Jain2, Virinder S. Parmar2 •
Odense University1, University of Delhi2
01 Jun 1995-Phytochemistry
TL;DR: In this article, a lignan and three neolignans were identified from the leaves and stems of Piper clarkii and their structures were established on the basis of 1 H, 13 C and 1 H 1 H COSY NMR, NOE and mass spectral data and CD curves.

25 citations

Journal Article•DOI•
Investigation of the Competition between Electron Transfer and SN2 in the Reaction between Anthracene Radical Anion and the Methyl Halides.

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Kim Daasbjerg, Torben Bo Christensen, Joan F. Carvalho, John Varadarajan, Jo Klaveness, Virinder S. Parmar, Nawal K. Sharma, Amitabh Jha, Kirpal S. Bisht 
01 Jan 1995-Acta Chemica Scandinavica

25 citations

Journal Article•DOI•
Neolignans from Piper schmidtii and Reassignment of the Structure of Schmiditin

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O. D. Tyagi, Ashok K. Prasad, Jesper Wengel, Per M. Boll, Carl Erik Olsen, Virinder S. Parmar, Nawal K. Sharma, Amitabh Jha, Kirpal S. Bisht 
01 Jan 1995-Acta Chemica Scandinavica
TL;DR: Tyagi et al. as mentioned in this paper proposed a new neolignan, (7R,8S,1 'S)-A, from Piper schmidtii and reassignment of the structure of Schmiditin.
Abstract: Department of Chemistry, University of Delhi, Delhi-11 0 007, India Tyagi, 0. D., Prasad, A. K., Wengel, J., Boll, P.M., Olsen, C. E., Parmar, V. S., Sharma, N. K., Jha, A. and Bisht, K. S., 1995. Neolignans from Piper schmidtii and Reassignment of the Structure of Schmiditin. - Acta Chern. Scand. 49: 142 -148 © Acta Chemica Scandinavica 1995. A new neolignan, (7R,8S,1 'S)-A

12 citations

Journal Article•DOI•
A benzoic acid ester from Uvaria narum

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Virinder S. Parmar1, Kirpal S. Bisht1, Abha Malhotra1, Amitabh Jha1, William Errington2, Oliver W. Howarth2, O. D. Tyagi3, Paul C. Stein, Søren Rosendal Jensen3, Per M. Boll3, Carl Erik Olsen •
University of Delhi1, University of Warwick2, Odense University3
01 Mar 1995-Phytochemistry
TL;DR: In this article, a new benzoic acid ester, 2-E-[2″-oxo-cyclopent-3″-en-1″-ylidene]ethyl benzoate, together with tritriacontane, tetratriacontanol and β-sitosterol have been isolated from a petrol extract of the leaves of Uvaria narum.

11 citations

Journal Article•DOI•
Preparation and Determination of the Absolute Configuration of Optically Active 9-Hydroxy-7-oxabicyclo[4.3.0]non-4-en-8-ones

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David E. Hibbs, Michael B. Hursthouse, Lars J. S. Knutsen, K. M. Abdul Malik, Horacio F. Olivo, Stanley M. Roberts, David R. Varley, Hui Xiong, Kirpal S. Bisht 
01 Jan 1995-Acta Chemica Scandinavica

5 citations

Journal Article•DOI•
Methylenedioxyphenyl substituted compounds from Piper species as inhibitors of liver microsome-mediated aflatoxin B1-DNA binding in vitro

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Hanumantharao G. Raj1, Sangita Gupta1, Ashok K. Prasad2, Per M. Boll2, Jesper Wengel2, Gopa Biswas1, Sanjay Singh1, Nawal K. Sharma1, Kirpal S. Bisht1, Virinder S. Parmar1 •
University of Delhi1, Odense University2
03 Aug 1995-Bioorganic & Medicinal Chemistry Letters
TL;DR: Several compounds from Piper species bearing methylenedioxyphenyl moieties are reported for the first time to effectively inhibit the rat liver microsome-mediated aflatoxin B1-DNA binding in vitro.

3 citations

Journal Article•DOI•
Response Surface Investigation and Optimisation of an Etherification Reaction of a Compound Containing Several Hydroxylic Groups.

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Hans-René Bjørsvik, Audun Aukrust, Lars J. S. Knutsen, K. M. Abdul Malik, Horacio F. Olivo, Stanley M. Roberts, David R. Varley, Hui Xiong, Kirpal S. Bisht 
01 Jan 1995-Acta Chemica Scandinavica

2 citations

Journal Article•DOI•
3-[3-(4-Bromophenyl)-1-phenylpyrazol-5-yl]-2H-1-benzopyran-2-one

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S. K. Singh, Naresh Kumar, Sanjay Malhotra, Kirpal S. Bisht, V. S. Parmar, William Errington 
15 Nov 1995-Acta Crystallographica Section C-crystal Structure Communications
TL;DR: In the title compound, C 24 H 15 BrN 2 O 2, the angles formed by the planes of the bromophenyl, phenyl and coumarin groups with the plane of the pyrazole nucleus are 19.3, 38.8 and 65.6°, respectively as discussed by the authors.
Abstract: In the title compound, C 24 H 15 BrN 2 O 2 , the angles formed by the planes of the bromophenyl, phenyl and coumarin groups with the plane of the pyrazole nucleus are 19.3, 38.8 and 65.6°, respectively. The absolute structure has been determined.
Journal Article•DOI•
Methylenedioxyphenyl Substituted Compounds from Piper Species as Inhibitors of Liver Microsome-Mediated Aflatoxin B1-DNA Binding in vitro.

[...]

Hanumantharao G. Raj1, Sangita Gupta1, Ashok K. Prasad2, Per M. Boll2, Jesper Wengel2, Gopa Biswas1, Sanjay Singh1, Nawal K. Sharma1, Kirpal S. Bisht1, Virinder S. Parmar1 •
University of Delhi1, Odense University2
05 Dec 1995-ChemInform
TL;DR: Several compounds from Piper species bearing methylenedioxyphenyl moieties were reported for the first time to effectively inhibit the rat liver microsome-mediated aflatoxin B1-DNA binding in vitro as mentioned in this paper.
Abstract: Several compounds from Piper species bearing methylenedioxyphenyl moieties are reported for the first time to effectively inhibit the rat liver microsome-mediated aflatoxin B1-DNA binding in vitro. From the preliminary results obtained, a structure-activity relationship is proposed.