91998-75-3

Basic information

• Product Name: 4H-1-Benzopyran-4-one, 6-chloro-2,3-dihydro-2-hydroxy-
• CAS NO: 91998-75-3
• Molecular Formula: C9H7ClO3
• Molecular Weight: 198.606
• Mol File: 91998-75-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4H-1-Benzopyran-4-one, 6-chloro-2,3-dihydro-2-hydroxy-(CAS DataBase Reference)
• NIST Chemistry Reference: 4H-1-Benzopyran-4-one, 6-chloro-2,3-dihydro-2-hydroxy-(91998-75-3)
• EPA Substance Registry System: 4H-1-Benzopyran-4-one, 6-chloro-2,3-dihydro-2-hydroxy-(91998-75-3)

Safety Data

• Hazardous Substances Data: 91998-75-3(Hazardous Substances Data)

Upstream product

• 51085-92-8 6-chloro-4-oxo-4H-chromene-3-carboxylic acid 

Downstream Products

• 91998-82-2 3-(5-Chloro-2-hydroxy-phenyl)-3-oxo-propionaldehyde oxime 

Relevant articles and documents

Benzopyrans : Part 40 - Alumina mediated transformations of 4-oxo-4H-1- benzopyran-3-carbaldehyde, -3-carboxylic acid and their 2-methylhomologues

In contact with alumina, the title aldehyde 1 (R = H, Me, Cl) gives the chromones 5 and 9,12 whereas the acid 2 affords the chromones 7, 10 and acetophenone 23. Alumina converts the aldehyde 3 to the xanthone 14, and the corresponding acid 4 to the chromone 8 and diketone 24.