110 



REACTIONS INVOLVED IN 



[OH. 



Table giving properties and characteristics of the commoner fiavones. 



Flavone 

 Quercetin 



Myricetin 



Constitutional Formula 



Products of 

 Decomposition 

 Melting Point from Alkali Melt 



Distribution 



HO CO 



HO CO 



Sublimes 



- OH above 250 

 OH 



357 C 



Phloroglucin Free and as various gluco- 



and 



protocatechuic 

 acid 



sides in Quercus (bark), 

 Rhamnus (berries), flowers 

 of Cheiranthus, Crataegus, 

 Viola, Prunus, Hibiscus, 

 leaves of Ailanthus, Rhus, 

 Arctostaphylos, Calluna, Eu- 

 calyptus and many others 



Phloroglucin Myrica (bark), leaves of Rhus, 

 and Haematoxylon, Arctostaphy- 



gallic acid los 



Fisetin 



Chrvsin 



Above 360 C 



275 



347 



OH 



HO CO 



Luteolin O 



/\ 

 HO 



HO CO 



Kampherol 



OH 

 OH 



327 C 



276 



OH 



Resorcinol 



and 



protocatechuic 

 acid 



Phloroglucin 



and 

 benzoic acid 



Rhus (wood) 



Populus (buds) 



Phloroglucin Leaves of Apimn, Reseda 



and 

 p-oxybenzoie 



acid 



Phloroglucin Leaves of Reseda, Genista, 



and Digitalis 



protocatechuic 

 acid 



Phloroglucin In flowers of Prunus, Del- 



and phinium, leaves of Poly- 



?;-oxybenzoic gonum, Indigofera, Robinia 

 acid 



HO CO 



