124909-99-5

Basic information

• Product Name: Toluene-4-sulfonic acid 2-(4-benzyloxy-phenyl)-3-hydroxy-6,7-dimethoxy-4-oxo-4H-chromen-5-yl ester
• Synonyms: Toluene-4-sulfonic acid 2-(4-benzyloxy-phenyl)-3-hydroxy-6,7-dimethoxy-4-oxo-4H-chromen-5-yl ester
• CAS NO: 124909-99-5
• Molecular Weight: 574.608
• Mol File: 124909-99-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Toluene-4-sulfonic acid 2-(4-benzyloxy-phenyl)-3-hydroxy-6,7-dimethoxy-4-oxo-4H-chromen-5-yl ester(CAS DataBase Reference)
• NIST Chemistry Reference: Toluene-4-sulfonic acid 2-(4-benzyloxy-phenyl)-3-hydroxy-6,7-dimethoxy-4-oxo-4H-chromen-5-yl ester(124909-99-5)
• EPA Substance Registry System: Toluene-4-sulfonic acid 2-(4-benzyloxy-phenyl)-3-hydroxy-6,7-dimethoxy-4-oxo-4H-chromen-5-yl ester(124909-99-5)

Safety Data

• Hazardous Substances Data: 124909-99-5(Hazardous Substances Data)

Upstream product

• 98-59-9 p-toluenesulfonyl chloride 
• 14801-88-8 2-(4-Benzyloxy-phenyl)-3,5,6,7-tetramethoxy-chromen-4-one 
• 1486-49-3 p-(benzyloxy)benzoic acid anhydride 
• 124909-92-8 Toluene-4-sulfonic acid 2-(4-benzyloxy-phenyl)-3,6,7-trimethoxy-4-oxo-4H-chromen-5-yl ester 
• 14801-90-2 2-(4-benzyloxy-phenyl)-5-hydroxy-3,6,7-trimethoxy-chromen-4-one 
• 14639-73-7 1-(3,6-dihydroxy-2,4-dimethoxy-phenyl)-2-methoxy-ethanone 

Downstream Products

• 29536-41-2 3,5,4'-trihydroxy-6,7-dimethoxy-flavone 
• 29536-43-4 3,5-diacetoxy-2-(4-acetoxy-phenyl)-6,7-dimethoxy-chromen-4-one 
• 124910-03-8 2-(4-Benzyloxy-phenyl)-3,5-dihydroxy-6,7-dimethoxy-chromen-4-one 

Relevant articles and documents

STUDIES OF THE SELECTIVE O-ALKYLATION AND DEALKYLATION OF FLAVONOIDS. XII. A NEW, CONVENIENT METHOD FOR SYNTHESIZING 3,5-DIHYDROXY-6,7-DIMETHOXYFLAVONES FROM 3,5,6,7-TETRAMETHOXYFLAVONES

The 5-methoxy group on 3,5,6,7-tetramethoxyflavones and the 3-methoxy group on 3,6,7-trimethoxy-5-tosyloxy-flavones were selectively cleaved with anhydrous aluminum bromide in acetonitrile under controlled conditions without the cleavage of benzyloxy groups on the B ring.By the application of these reactions, seven 3,5-dihydroxy-6,7-dimethoxyflavones were easily synthesized from the corresponding 3,5,6,7-tetramethoxyflavones which were synthesized from 3,6-dihydroxy-2,4ω-trimethoxycetophenone by means of the Allan-Robinson reaction followed by methylation.Keywords: Allan-Robinson reaction ; selective demethylation; 3,5,6,7-tetramethoxyflavone; 5-hydroxy-3,6,7-trimethoxyflavone; 6-hydroxy-3,5,7-trimethoxyflavone; 5-tosyloxyflavone; 5,6-dihydroxy-3,7-dimethoxyflavone; 3,5-dihydroxy-6,7-dimethoxyflavone, 3,5-diacetoxy-6,7-dimethoxyflavone