Journal ArticleDOI
On the chemistry of indian orchidaceae plants—II
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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
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New Fluorene Derivatives from Dendrobium gibsonii and Their α-Glucosidase Inhibitory Activity.
May Thazin Thant,Nutputsorn Chatsumpun,Wanwimon Mekboonsonglarp,Boonchoo Sritularak,Kittisak Likhitwitayawuid +4 more
TL;DR: Two new compounds, dihydrodengibsinin and dendrogibsol, were isolated from the whole plant of Dendrobium gibsonii, together with seven known compounds and it was revealed that dendrogramibsol is a noncompetitive inhibitor of α-glucosidase.
Journal ArticleDOI
Synthesis of 1-Substituted Fluorenones
TL;DR: A convenient and scalable synthesis of a range of 1-substituted fluorenones from readily available starting materials using robust and readily reproducible chemistry is described.
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PEG-Mediated Catalyst-Free Expeditious Synthesis of Functionalized Benzene/Biaryl and Fluoren-9-one Derivatives from Activated Acetylenes and 1,3-Diones
TL;DR: In this article, a sustainable, nonvolatile, and environmentally friendly solvent for the synthesis of functionalized benzene/biaryl and fluoren-9-one derivatives from activated acetylenes and 1,3-diones at 100 o C.
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Multicomponent Domino [4+1+1] Carbocyclization Providing an Efficient and Regioselective Strategy to Fluoren-9-ones
TL;DR: In this paper, a three-component domino [4+1+1] carbocyclization to highly substituted fluoren-9-one derivatives promoted by K2CO3 has been developed under microwave irradiation conditions.
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Scorpionate ligand derived from 1-amino-9H-fluoren-9-ol and its metal (II) complexes as potential anticancer agents
Mahantesh Kumbar,Sangamesh A. Patil,Shivashankar M. Kinnal,Shailaja S. Jawoor,Arun Kashivishwanath Shettar +4 more
TL;DR: In this article, a tridentate ligand with ONO donor system was synthesized from less explored 1-amino-9H-fluoren-9-ol and salicylaldehyde and its coordination compounds of some first row transition metals.
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
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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.
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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.
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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.