90104-85-1

Basic information

• Product Name: 2H-1-Benzopyran-2-one, 8-benzoyl-7-hydroxy-
• CAS NO: 90104-85-1
• Molecular Formula: C16H10O4
• Molecular Weight: 266.253
• Mol File: 90104-85-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 2H-1-Benzopyran-2-one, 8-benzoyl-7-hydroxy-(CAS DataBase Reference)
• NIST Chemistry Reference: 2H-1-Benzopyran-2-one, 8-benzoyl-7-hydroxy-(90104-85-1)
• EPA Substance Registry System: 2H-1-Benzopyran-2-one, 8-benzoyl-7-hydroxy-(90104-85-1)

Safety Data

• Hazardous Substances Data: 90104-85-1(Hazardous Substances Data)

Upstream product

• 90-33-5 7-hydroxy-4-methyl-chromen-2-one 
• 31005-05-7 7-(phenylcarbonyl)oxy-2H-1-benzopyran-2-one 
• 98-88-4 benzoyl chloride 
• 93-35-6 7-hydroxy-2H-chromen-2-one 
• 2747-05-9 4-methylumbelliferyl acetate 
• 10387-49-2 7-acetyloxycoumarin 
• 66185-72-6 7-(phenylcarbonyl)oxy-4-methyl-2H-1-benzopyran-2-one 

Downstream Products

• 1033011-07-2 C₂₂H₁₈O₄ 
• 129136-90-9 (8-benzoyl-2-oxo-2H-chromen-7-yloxy)-acetic acid 
• 402821-19-6 ethyl 2-(8-benzoyl-2-oxo-2H-chromen-7-yloxy)acetate 
• 859323-72-1 8-benzoyl-3-bromo-7-hydroxy-coumarin 

Relevant articles and documents

Intermolecular character of the Fris rearrangement in the series of acyloxycoumarins

In the study of the Fris rearrangement in the series of 7-and 4-acyloxycoumarins we obtained certain data indicating intermolecular character of the rearrangement. The Fris rearrangement of a mixture of 7-benzoyloxy-4-metylcoumarin and 7-acetoxycoumarin results in formation of four reaction products in approximately equal molar ratio. Also, four products were obtained in the Fris rearrangement of 7-and 4-acyloxycoumarins in the presence of hydroxycoumarins. The Fris rearrangement of acyloxycoumarins in the presence of m-xylene at acylcoumarin-m-xylene ratio of 1:6 leads to the corresponding hydroxycoumarins and acylated m-xylenes. Intermediate formation of acylium ions was also detected by evolution of carbon monooxide at the Fris rearrangement of 7-pyvaloyloxy-and 7-isobutyryloxy-4-methylcoumarins. A product of intermolecular migration, 3-acetyl-4-hydoxy-6-methylcoumarin, was discovered also in the rearrangement of 4-acetoxycoumarin in the presence of 4-hydoxy-6-methylcoumarin catalyzed by phosphorus oxychloride.