59115-98-9

Upstream product

• 480-66-0 2,4,6-trihydroxyacetophenone 
• 100-07-2 4-methoxy-benzoyl chloride 
• 108-73-6 3,5-dihydroxyphenol 

Downstream Products

• 80443-10-3 5-hydroxy-4'-methoxyflavone 7-O-β-D-galactopyranoside tetraacetate 
• 480-44-4 5,7-dihydroxy-2-(4'-methoxyphenyl)-4H-1-benzopyran-4-one 
• 80443-15-8 acacetin 7-O-β-D-galactopyranoside 
• 874519-13-8 5,7-dihydroxy-3-(4-methoxy-benzoyl)-2-(4-methoxy-phenyl)-chromen-4-one 
• 80443-16-9 C₃₂H₂₆O₁₀ 

Relevant academic research and scientific papers

3-Aroyl-5-hydroxyflavones: Synthesis and mechanistic studies by mass spectrometry

The synthesis and mass spectra of three 3-aroyl-5-hydroxflavones are reported. The interpretation of the mechanistic pathways for the fragmentation of the metastable molecular ions of these compounds was achieved through the analysis of their mass-analysed ion kinetic energy (MIKE) spectra and of the B2/E spectra of a few fragment ions. Labelling of the hydroxyl proton with deuterium and the analysis of the MIKE spectra of a model compound with chlorine atoms in the 2',6'- and 2',6'-positions led to a mechanism for the losses of OH. and HCO. which involves hydrogen migration from the 2'- or 6'-position to the 6-carbonyl oxygen atom. A mechanism for the loss of a neutral molecule of anisole from the molecular ion of the 3-aroyl-5-hydroxyflavone with a methoxyl group in the 4'- and 4'-positions is also suggested. For the flavones with hydrogen or chlorine substituents at these positions, loss of a phenyl (or chlorophenyl) radical occurs instead.

ACACETIN 7-O-β-D-GALACTOPYRANOSIDE FROM CHRYSANTHEMUM INDICUM

Key Word Index - Chrysanthemum indicum; Compositae; acacetin 7-O-β-D-galactopyranoside. From the yellow flowers of Chrysanthemum indicum, a new flavone glycoside, acacetin 7-O-β-D-galactopyranoside was isolated and its structure established from spectral evidence and synthesis.