833-31-8

Basic information

• Product Name: 4-Methyl-2-oxo-2H-chromene-3-carboxylic acid
• Synonyms: 4-Methyl-2-oxo-2H-chromene-3-carboxylic acid
• CAS NO: 833-31-8
• Molecular Formula: C₁₁H₈O₄
• Molecular Weight: 204.18
• Mol File: 833-31-8.mol
• Article Data: 9

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 4-Methyl-2-oxo-2H-chromene-3-carboxylic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Methyl-2-oxo-2H-chromene-3-carboxylic acid(833-31-8)
• EPA Substance Registry System: 4-Methyl-2-oxo-2H-chromene-3-carboxylic acid(833-31-8)

Safety Data

• Hazardous Substances Data: 833-31-8(Hazardous Substances Data)

Upstream product

• 24526-69-0 4-methyl-2-oxo-2H-chromene-3-carbonitrile 
• 24526-68-9 4-methyl-2-oxo-2H-chromene-3-carboxamide 
• 118-93-4 o-hydroxyacetophenone 
• 1196-29-8 2-hydroxyacetophenoneoxime 
• 7327-78-8 2-[1-(2-phenylhydrazino)ethyl]phenol 
• 2033-24-1 cycl-isopropylidene malonate 
• 99275-33-9 4-methyl-2-oxo-2H-1-benzopyran-3-carboxylic acid 2-phenylhydrazide 
• 89228-65-9 4-Methyl-2-oxo-2H-chromene-3-carboxylic acid hydroxyamide 

Downstream Products

• 607-71-6 4-methyl-2H-chromen-2-one 
• 1311403-51-6 4-(but-3-en-1-yl)-2H-chromen-2-one 

Relevant articles and documents

Silver-Mediated Oxidative Decarboxylative Trifluoromethylthiolation of Coumarin-3-carboxylic Acids

The introduction of trifluoromethylthio groups into organic compounds, in particular heterocycles, is important because of the prevalence of these structures in medicinally and agriculturally relevant molecules. Herein, the silver-mediated oxidative decarboxylative trifluoromethylthiolation of coumarin-3-carboxylic acids is reported. This methodology utilizes existing carboxylic acid functionalities for the direct conversion to CF3S groups and results in a broad scope of 3-trifluoromethylthiolated coumarins, including analogues of natural products, in moderate to excellent yields.

Rapid synthesis of novel and known coumarin-3-carboxylic acids using stannous chloride dihydrate under solvent-free conditions

Various coumarin-3-carboxylic acid (=2-oxo-2H-1-benzopyran-3-carboxylic acid; CcaH) derivatives have been synthesized in good yields using catalytic amounts of SnCl2·2 H2O under solvent-free conditions. This inexpensive, nontoxic, and readily available catalytic system (10 mol-%) efficiently catalyzes the Knoevenagel condensation and intramolecular cyclization of various 2-hydroxybenzaldehydes or acetophenones with Meldrum's acid. High product yields, use of inexpensive and safe catalyst, and solvent-free conditions display both economic and environmental advantages. Copyright

COSMETIC OR DERMATOLOGICAL COMPOSITION COMPRISING A POLYMER BEARING JUNCTION GROUPS, AND COSMETIC TREATMENT PROCESS

The present patent application relates to a cosmetic or dermatological composition comprising, in a cosmetically or dermatologically acceptable medium, a polymer comprising: (a) a polymer backbone that may be obtained by reaction: of a polyol comprising 3 to 6 hydroxyl groups;of a monocarboxylic acid containing 6 to 32 carbon atoms;of a polycarboxylic acid comprising at least two carboxylic groups COOH, and/or of a cyclic anhydride such as a polycarboxylic acid and/or of a lactone comprising at least one carboxylic group COOH; and(b) at least one junction group linked to the said polymer backbone and capable of establishing H bonds with one or more partner junction groups, each pairing of a junction group involving at least three H (hydrogen) bonds. The patent application also concerns a cosmetic treatment process using the said composition.