Journal ArticleDOI
On the chemistry of indian orchidaceae plants—II
TLDR
In this paper, the first natural fluorenone derivatives of Dendrobium gibsonii, namely dengibsin and Dengibsnin, have been assigned 1,5-dihydroxy-7-methoxy-9-fluorenone structures.About:
This article is published in Tetrahedron.The article was published on 1985-01-01. It has received 33 citations till now. The article focuses on the topics: Dendrobium gibsonii & Dimethyl terephthalate.read more
Citations
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Journal ArticleDOI
Efficient Synthesis of Fluoren-9-ones by the Palladium-Catalyzed Annulation of Arynes by 2-Haloarenecarboxaldehydes
TL;DR: Fluoren-9-ones and derivatives are readily prepared in good yields by the annulation of in situ generated arynes by 2-haloarenecarboxaldehydes in the presence of a palladium catalyst.
Patent
Bio-based terephthalate polyesters
Corrado Berti,Enrico Binassi,Martino Colonna,Maurizio Fiorini,Ganesh Kannan,Sreepadaraj Karanam,Marzia Mazzacurati,Ihab N. Odeh +7 more
TL;DR: In this paper, the process of making bio-based polyesters is described, which are produced from a biomass containing a terpene or terpenoid, such as limonene.
Journal ArticleDOI
Palladium-catalyzed one-pot Suzuki coupling followed by arylpalladium addition to aldehyde: a convenient route to fluoren-9-one derivatives
TL;DR: In this article, a one-pot reaction involving sequential Suzuki coupling of 2-bromophenyl boronic acid with 2bromocarboxaldehyde followed by intramolecular arylpalladium addition to aldehyde was used to obtain fluoren-9-one derivatives.
Journal ArticleDOI
Fluoren-9-ones and carbazoles in the Posidonia Shale, Hils Syncline, northwest Germany
TL;DR: In this article, the distribution of alkylated fluoren-9-ones and carbazoles, including their benzo- and dibenzo-and/or naphtho-annellated derivatives, have been investigated in rock extracts from a maturity sequence of Posidonia Shales from the Hils Syncline of northwest Germany.
Journal ArticleDOI
Phloroglucinol enhances recovery and survival of cryopreserved Dendrobium nobile protocorms
TL;DR: This study demonstrated an efficient procedure for cryopreservation and subsequent recovery and survival ofcryopreserved D. nobile protocorms using phloroglucinol as a cryoprotectant additive.
References
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Journal ArticleDOI
In situ reactions with trichloroacetyl isocyanate and their application to structural assignment of hydroxy compounds by 1 H NMR spectroscopy. A general comment
Zdeněk Samek,Miloš Buděšínský +1 more
Journal ArticleDOI
Pongaglabol, a new hydroxyfuranoflavone, and aurantiamide acetate, a dipeptide from the flowers of Pongamia glabra
TL;DR: The structure of pongaglabol has been established as 5-hydroxyfurano(8,7-4″,5″)flavone on the basis of spectral and chemical evidence.
Journal ArticleDOI
Solvent effects in NMR Spectroscopy : Solvent shifts of methoxyl resonances in flavones induced by benzene; an aid to structure elucidation
TL;DR: In this paper, the position and relative orientation of OMe groups in methoxyflavones can be inferred from benzene-induced solvent shifts of the OMe resonances, and the authors show that an OMe at C-5 suffers a drastic algebraic decrease in solvent shift upon the introduction of an ortho-OMe group at c-6.
Journal ArticleDOI
Studies on Ketene and Its Derivatives. CX. Synthesis of 1,3-Dimethoxyfluoren-9-ones
TL;DR: In this paper, the synthesis of 1, 3-dimethoxyfluoren-9-ones (7a-f) from ethyl 2-aryl-4, 6-dihydroxybenzoates (4a-d) was described.