87402-97-9Relevant academic research and scientific papers
FLAVONOIDS FROM AGERATUM CORYMBOSUM
Quijano, Leovigildo,Gomez-Garibay, Federico,Garcia-Perez, Guillermina,Rios, Tirso
, p. 2859 - 2862 (2007/10/02)
Investigation of a new collection of Ageratum corymbosum resulted in the isolation of three new flavonoids, 4'-hydroxy-5,6,7,3'tetramethoxyflavanone, 5-hydroxy-6,7,2',3',4',5'-hexamethoxyflavone and 3'-hydroxy-5,6,7,2',4',5'-hexamethoxyflavone, named agecorynins E, F and G, respectively.Their structures were established by spectral methods and chemical transformations. 5-Hydroxy-7,8,2',3',4',5'-hexamethoxyflavone (isoagerocorynin F), obtained from agehoustin B, is also reported. Key words: Ageratum corymbosum; Asteraceae; Eupatoriae; flavones; flavanones; heptasubstituted and hexasubstituted flavones.
Syntheses of Agehoustins-A and B
Bhardwaj, D. K.,Chand, Gyan,Jain, Anita,Srivastava, Nagesh,Sharma, A. K.
, p. 1163 - 1164 (2007/10/02)
Agehoustins-A and B formulated as 5,6,7,8,2',3',4',5'-octamethoxyflavone (I) and 5,6,7,2',3',4',5'-heptamethoxyflavone (II) respectively, have been synthesised by the cyclodehydrogenations of the corresponding 2'-hydroxy-3',4',5',6',2,3,4,5-octamethoxychalkone (III) and 2'-hydroxy-4',5',6',2,3,4,5-heptamethoxychalkone (IV).
Synthetic studies on the flavone derivatives. XIII. Synthesis of flavones with tetramethoxyl groups in ring B
Iinuma,Tanaka,Matsuura
, p. 3354 - 3360 (2007/10/02)
2',3',4',5,5',6,7,8-Octamethoxy- (Ia) and 2',3',4',5,5',6,7-heptamethoxyflavone (IIa) and their position isomers substituted with tetramethoxyl groups in ring B were synthesized to confirm the structures of agehoustin A and agehoustin B isolated from Ageratum houstonianum. The characteristics of the synthesized flavones were investigated by spectroscopic methods.
