93092-22-9

Upstream product

• 186581-53-3 diazomethane 
• 83133-16-8 5,5'-dihydroxy-2',3',6,7-tetramethoxyflavone 
• 93092-21-8 5'-benzyloxy-2',3',5,6,7-pentamethoxyflavone 
• 22248-14-2 6-hydroxy-2,3,4-trimethoxyacetophenone 
• 62648-55-9 5-hydroxy-2,3-dimethoxybenzaldehyde 
• 93092-16-1 5-(benzyloxy)-2,3-dimethoxybenzaldehyde 
• 93092-14-9 1-bromo-5-hydroxy-2,3-dimethoxybenzene 
• 93092-15-0 1-cyano-5-hydroxy-2,3-dimethoxybenzene 
• 93092-20-7 5-benzyloxy-2'-hydroxy-2,3,4',5',6'-pentamethoxychalcone 

Downstream Products

• 83133-16-8 5,5'-dihydroxy-2',3',6,7-tetramethoxyflavone 

Relevant academic research and scientific papers

Synthetic Studies on the Flavone Derivatives. XII. Synthesis of 2',3',5'- and 3',4',5'-Trioxygenated Flavones

Two unusual flavones, 5,5'-dihydroxy-2',3',6,7-tetramethoxyflavone (1) from Gardenia cramerii and 4',5-dihydroxy-3',5',6,7-tetramethoxyflavone (6) from Artemisia mesatlantia, and their position isomers were synthesized to investigate the structural correlation in terms of spectral data.The structure of the flavone from G. cramerii is discussed.Keywords: 5,5'-dihydroxy-2',3',6,7-tetramethoxyflavone; 2',5-dihydroxy-3',5',6,7-tetramethoxyflavone; 5-hydroxy-2',3',5',6,7-pentamethoxyflavone; 3',5-dihydroxy-4',5',6,7-tetramethoxyflavone; 4',5-dihydroxy-3',5',6,7-tetramethoxyflavone; 5-hydroxy-3',4',5',6,7-pentamethoxyflavone.

FLAVONOIDS OF GARDENIA CRAMERII AND G. FOSBERGII BUD EXUDATES

From the bud exudates of Gardenia cramerii and G. fosbergii, two species endemic to Sri Lanka, a new flavonoid with an unusual B-ring oxidation pattern, 5,5'-dihydroxy-6,7,2',3'-tetramethoxyflavone, was characterized.Two other rare flavonoids, 5,3',5'-trihydroxy-3,6,7,4'-tetramethoxyflavone and 5-hydroxy-6,7,3',4',5'-pentamethoxyflavone were also isolated from both Gardenia species.Key Word Index - Gardenia cramerii; G. fosbergii; Rubiaceae; bud exudates; 5,5'-dihydroxy-6,7,2',3'-tetramethoxyflavone; 5,3',5'-trihydroxy-3,6,7,4'-tetramethoxyflavone; 5-hydroxy-6,7,3',4',5'-penta methoxyflavone.