Journal ArticleDOI
Structural and synthetic studies on the retrofractamides—amide constituents of Piper retrofractum
Avijit Banerji,Debabrata Bandyopadhyay,Manjusha Sarkar,Arup K. Siddhanta,Sudhir C. Pal,Somnath Ghosh,Koshy Abraham,James N. Shoolery +7 more
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TLDR
In this article, two unsaturated amides, retrofractamides A and C, were isolated from the total aboveground parts of Piper retroractum and were shown to be N -isobutyl-9(3′,4′-methylenedioxyphenyl)2 E,4 E,8 E -nonatrienamide from spectroscopic and chemical investigations.About:
This article is published in Phytochemistry.The article was published on 1985-02-05. It has received 42 citations till now. The article focuses on the topics: Piper retrofractum.read more
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Phytochemistry of the genus Piper
Virinder S. Parmar,Subhash C. Jain,Kirpal S. Bisht,Rajni Jain,Poonam Taneja,Amitabh Jha,O. D. Tyagi,Ashok K. Prasad,Jesper Wengel,Carl Erik Olsen,Per M. Boll,Per M. Boll +11 more
TL;DR: The secondary metabolites isolated from Piper species for the period 1907 to June 1996 have been reviewed in this paper, where nearly six hundred chemical constituents belonging to different classes of bioactive compounds are listed together with their source(s) and references.
Journal ArticleDOI
Larvicidal activity of isobutylamides identified in Piper nigrum fruits against three mosquito species
TL;DR: Structural-activity relationships indicate that the N-isobutylamine moiety might play a crucial role in the larvicidal activity, but the methylenedioxyphenyl moiety does not appear essential for toxicity.
Journal ArticleDOI
Benzoic Acid Derivatives from Piper Species and Their Fungitoxic Activity against Cladosporium cladosporioides and C. sphaerospermum
João Henrique G. Lago,Clécio Sousa Ramos,Diego Campos C. Casanova,Andreia de A. Morandim,Debora Cristina B. Bergamo,Alberto José Cavalheiro,Vanderlan da Silva Bolzani,Maysa Furlan,Elsie F. Guimarães,Maria Claudia Marx Young,Massuo J. Kato +10 more
TL;DR: Piper crassinervium, P. aduncum,P.
Journal ArticleDOI
Constituents of Chinese Piper species and their inhibitory activity on prostaglandin and leukotriene biosynthesis in vitro.
TL;DR: The n-hexane extracts of 19 Piper species, predominantly from China, were screened for their 5-lipoxygenase (5-LOX) and cyclo oxygengenase-1 (COX-1) inhibitory potential and showed considerable inhibitory activity against at least one of these two key enzymes of the arachidonic acid metabolism.
Journal ArticleDOI
Polyphenols and alkaloids from piper species
Virinder S. Parmar,Subhash C. Jain,Sangita Gupta,S. Talwar,Vivek K. Rajwanshi,Rajesh Kumar,Abul Azim,Sanjay Malhotra,Naresh Kumar,Rajni Jain,Nawal K. Sharma,O. D. Tyagi,Stephen J Lawrie,William Errington,Oliwer W Howarth,Carl Erik Olsen,Sanjay K.Singh¶andJesper Wengel +16 more
TL;DR: In this paper, twelve Piper species were extracted from the stems and leaves of P. manii and β-sitosteryl palmitate was obtained for the first time from P. brachystachyum.
References
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The Utility of Phosphonate Carbanions in Olefin Synthesis
Journal ArticleDOI
Olefin synthesis with organic phosphonate carbanions
John Boutagy,Richard W. Thomas +1 more
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A new and selective method of oxidation. the conversion of alkyl halides and alkyl tosylates to aldehydes
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Alkaloids of Piper longum Linn—I : Structure and synthesis of piperlongumine and piperlonguminine
Asima Chatterjee,C.P. Dutta +1 more
TL;DR: Piperlongumine and piperlonguminine are shown to be N-(3,4,5-trimethoxycinnamoyl)-Δ5-piperidin-2-one and isobutylamide of piperic acid respectively.