33777-51-4

Basic information

• Product Name: 5-benzoyloxy kojic acid
• Synonyms: 5-benzoyloxy kojic acid
• CAS NO: 33777-51-4
• Molecular Weight: 246.219
• Mol File: 33777-51-4.mol

Chemical Properties

• CAS DataBase Reference: 5-benzoyloxy kojic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 5-benzoyloxy kojic acid(33777-51-4)
• EPA Substance Registry System: 5-benzoyloxy kojic acid(33777-51-4)

Safety Data

• Hazardous Substances Data: 33777-51-4(Hazardous Substances Data)

Upstream product

• 501-30-4 5-hydroxy-2-(hydroxymethyl)-4H-pyran-4-one 
• 98-88-4 benzoyl chloride 

Downstream Products

• 96583-19-6 5-benzoyloxy-2-chloromethyl-pyran-4-one 
• 33777-44-5 2-acetoxymethyl-5-benzoyloxy-pyran-4-one 

Relevant articles and documents

Asymmetric induction in intramolecular [5 + 2] cycloaddition of 2-(4-alkenyl)-5-benzoyloxy(or 5-silyloxy)-4-pyrones involving migration of the pyrone O-5 group to O-4

Heating of the title compounds (1a,b) at 130°C in o-dichlorobenzene afforded [5+2] annulation products (2a,b) in 70% yield; 27-33% d.e. via 3-oxidopyrylium ylide. Reaction of the title compounds (1b,c) in the presence of ZnCl2 at 40°C furnished

Temporary Tethering Strategies for Pyrone-Alkene Cycloadditions

Temporary connection of alkenes to 3-alkoxy-4-pyrones via sulfur or silicon tethers allows their thermal cycloaddition and ensures complete regio- and stereochemical control.

Coordinative Role of Alkali Cations in Organic Reactions. IV. Benzoylation, Phenacylation, and Benzylation of Kojic Acid

Using kojic acid (5-hydroxy-2-hydroxymethyl-4-pyrone) as a substrate, the title reactions were carried out with various alkali metal hydroxides.Whereas phenacylation (with KOH or NaOH) and benzylation (with KOH, NaOH, or LiOH) are possible only on the phenolic hydroxyl, benzoylation can be carried out selectively as well as collectively on both the hydroxyl group (in 80percent aq.EtOH).The results were discussed in terms of the interactive role of alkali cations with the substrate.