Journal ArticleDOI
Rotundatin, a new 9,10-didydrophenanthrene derivative from Dendrobium rotundatum
P. L. Majumder,Suparna Pal +1 more
TLDR
Rotundatin, a new 9,10-dihydrophenanthrene derivative was isolated from the orchid, Dendrobium rotundatum, which also afforded the known stilbenoids 2,7-Dihydroxy-3,4,6-trimethoxyphenanthrin this article, nudol, moscatin and batatasin-III.About:
This article is published in Phytochemistry.The article was published on 1992-09-01. It has received 35 citations till now. The article focuses on the topics: Derivative (chemistry).read more
Citations
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Journal ArticleDOI
New Phenanthrenes and Stilbenes from Dendrobium loddigesii
Masanobu Ito,Keiichi Matsuzaki,Jue Wang,Jue Wang,Akihiro Daikonya,Nai-Li Wang,Xin-Sheng Yao,Susumu Kitanaka +7 more
TL;DR: It is suggested that this phenanthrene is a stronger inhibitor of NO production than dihydrophenanthrene, which has shown significant inhibitory activity against nitric oxide production.
Journal ArticleDOI
Bioactive Secondary Metabolites from Orchids (Orchidaceae).
TL;DR: A review of the literature on orchids that are used in traditional medicine has been reviewed in this work indicating a great potential of such organisms as source of chemical entities for the development of new drugs as mentioned in this paper.
Journal ArticleDOI
Dimeric phenanthrenes from the orchid Bulbophyllum reptans
TL;DR: In this paper, Reptanthrin and isoreptanthrin, two new dimeric phenanthrenes, were isolated from the orchid Bulbophyllum reptans which also afforded nine known stilbenoids, viz.
Journal ArticleDOI
Two New Stilbenoids from the Aerial Parts of Arundina graminifolia (Orchidaceae)
Florence Auberon,Opeyemi Joshua Olatunji,Stéphanie Krisa,Cyril Antheaume,Gaëtan Herbette,Frederic Bonte,Jean-Michel Mérillon,Annelise Lobstein +7 more
TL;DR: Two new phenanthrene derivatives and a 9,10-dihydrophenanthrene named arundigramin together with a known lignin dimer and seven known stilbenoids were isolated from the aerial parts of the Asian orchid Arundina graminifolia for their ability to reduce beta amyloid induced toxicity on undifferentiated PC12 cells.
Journal ArticleDOI
An efficient de novo synthesis of partially reduced phenanthrenes through C-C insertion.
Ramendra Pratap,Vishnu Ji Ram +1 more
TL;DR: An efficient and novel approach to the synthesis of highly congested 3-alkyl-, 4-alkYL-, 3-aryl, 3,4-dialkyl, 4-alksyl-3-aryl-, and 3-4-diaryl-9,10-dihydro-1-sec-aminophenanthrene-2-carbonitriles has been delineated through the base-catalyzed ring transformation.
References
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Journal ArticleDOI
Nudol, a phenanthrene of the orchids Eulophia nuda, Eria carinata and Eria stricta
TL;DR: An amorphous phenanthrene, named nudol has been isolated from Eulophia nuda, Eria carinata and E. stricta and was identified as 2,7-dihydroxy-3,4-dimethoxyphenanthrene.
Journal ArticleDOI
Structure and synthesis of batatasins, dormancy-inducing substances of yam bulbils
TL;DR: Batatasin, which occurs in dormant bulbils of yams and induces dormancy in this organ has been shown by spectrometric analysis and synthesis to be 3,3′-dihydroxy-5-methoxy-bibenzyl.
Journal ArticleDOI
Bulbophyllanthrin, a phenanthrene of the orchid Bulbophyllum leopardium
TL;DR: Bulbophyllanthrin, a novel phenanthrene derivative from the orchid B. leopardium, was shown to have the structure 1a mainly on the basis of spectral evidence including 13 C and 2D NMR spectra as discussed by the authors.
Journal ArticleDOI
Hircinol, eine antifungisch wirksame Substanz aus Knollen von Loroglossum hircinum (L.) RICH†
TL;DR: Aus Knollen von Loroglossum hircinum (L.) Rich, welche mit dem Pilz Rhizoctonia versicolor Muller et Nuesch infiziert worden sind, wird das fungistatisch wirksame Hircinol, C15H14O3, in Ausbeuten von 250-400 mg pro kg Knollengewebe isoliert as mentioned in this paper.
Journal ArticleDOI
Two stilbenoids from the orchid Cirrhopetalum andersonii
P.L. Majumder,Mausumi Basak +1 more
TL;DR: Cirhopetalanthridin and cirrhopetalidinin, two new stilbenoids isolated from the orchid Cirrus andersonii, were shown to be 4,7-dihydroxy-2,3-methylenedioxy-9,10-dhydrophenanthrene and 3,2′-Dihydrox-5′methoxy-4,5-methylenioxy bibenzyl, respectively, from spectral and chemical evidence as mentioned in this paper.
Related Papers (5)
Lusianthrin and lusianthridin, two stilbenoids from the orchid Lusia indivisa
P.L. Majumder,Saswati Lahiri +1 more