scholarly journals Structures of a novel 2-arylbenzofuran derivative and two flavone derivatives from the cultivated mulberry tree (Morus lhou Koidz.).

1985 ◽  
Vol 33 (10) ◽  
pp. 4288-4295 ◽  
Author(s):  
TOSHIO FUKAI ◽  
YOSHIO HANO ◽  
KAZUHIRO HIRAKURA ◽  
TARO NOMURA ◽  
JUN UZAWA
Keyword(s):  
Flavone Derivatives ◽  
Mulberry Tree

Relationship between structure and activity of flavone derivatives possessing antiallergic activity

1989 ◽  
Vol 23 (10) ◽  
pp. 852-856
Author(s):  
�. T. Oganesyan ◽  
I. S. Gushchin ◽  
S. R. Pershkov ◽  
A. S. Saraf
Keyword(s):  
Antiallergic Activity ◽  
Flavone Derivatives ◽  
Structure And Activity

scholarly journals SYNTHESIS OF FLAVONES FROM 2-HYDROXY ACETOPHENONE AND AROMATIC ALDEHYDE DERIVATIVES BY CONVENTIONAL METHODS AND GREEN CHEMISTRY APPROACH

2017 ◽  
Vol 10 (2) ◽  
pp. 403 ◽  
Author(s):  
Samir Patel ◽  
Umang Harishchandra Shah
Keyword(s):  
Organic Chemistry ◽  
Nuclear Magnetic Resonance ◽  
Melting Point ◽  
Biological Activities ◽  
Aromatic Aldehydes ◽  
Spectral Techniques ◽  
Standard Values ◽  
Flavone Derivatives ◽  
Conventional Methods ◽  
Layer Chromatography

Objective: Flavones occupy a special place in the realm of natural and synthetic organic chemistry owing to their diversified biological activities. In this study, a series of chalcone derivatives were synthesized and after cyclization of chalcone to synthesized various substituted flavone derivatives (2A-2L). 2 Methods: The reaction of 2-hydroxy acetophenone with substituted aromatic aldehydes produced chalcone by trituration (NaOH) and conventional methods (KOH/EtOH), which upon further cyclization with dimethyl sulfoxide/I  resulted to form flavone derivatives.Results: The purity of compounds was ascertained by melting point and thin-layer chromatography. The synthesized compounds have been characterized by mass, infrared, and1H nuclear magnetic resonance spectral analysis.Conclusion: Based on spectral data, it was proved that all synthesized chalcones and flavones derivatives meet the standard values of various spectral techniques and further it will be evaluated for pharmacological activities.Keywords: Chalcone, Flavone, Trituration, Conventional, Claisen-Schmidt condensation.

scholarly journals Formation of flavone-based wooly fibres by glandular trichomes of Dionysia tapetodes

2020 ◽  
Author(s):  
Matthieu Bourdon ◽  
Josephine Gaynord ◽  
Karin Müller ◽  
Gareth Evans ◽  
Simon Wallis ◽  
...  
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Cell Biology ◽  
Glandular Trichomes ◽  
Thread Formation ◽  
Flavone Derivatives ◽  
Chemical Techniques ◽  
Surface Covering ◽  
Membrane Cell ◽  
Putative Mechanism

AbstractDionysia tapetodes, a small cushion-forming mountainous evergreen in the Primulaceae, possesses a vast surface-covering of long silky fibres forming the characteristic “wooly” farina. This contrasts with some related Primula which instead possess a powdery farina. Using a combination of cell biology and analytical chemical techniques, we provide a detailed insight of wooly farina formation by glandular trichomes that produce a mixture of flavone and substituted flavone derivatives, including hydroxyflavones. Conversely, our analysis show that the powdery form consist almost entirely of flavone. The wooly farina in D. tapetodes is extruded through specific sites at the surface of the glandular head cell, characterised by a small complete gap in the plasma membrane, cell wall and cuticle. The data is consistent with formation and thread elongation occurring from within the cell. The putative mechanism of wool thread formation and its stability is discussed.

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