5891-82-7

Basic information

• Product Name: 3-Methyl-1H-naphtho[2,1-b]pyran-1-one
• Synonyms: 3-Methyl-1H-naphtho[2,1-b]pyran-1-one
• CAS NO: 5891-82-7
• Molecular Formula: C₁₄H₁₀O₂
• Molecular Weight: 210.23
• Mol File: 5891-82-7.mol
• Article Data: 8

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 3-Methyl-1H-naphtho[2,1-b]pyran-1-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3-Methyl-1H-naphtho[2,1-b]pyran-1-one(5891-82-7)
• EPA Substance Registry System: 3-Methyl-1H-naphtho[2,1-b]pyran-1-one(5891-82-7)

Safety Data

• Hazardous Substances Data: 5891-82-7(Hazardous Substances Data)

Upstream product

• 17771-66-3 (±)-3-methyl-2,3-dihydro-1H-benzo[f]chromen-1-one 
• 92254-17-6 2-methyl-6-[(E)-2-phenylethenyl]-4H-pyran-4-one 
• 708-06-5 2-hydroxynaphthalene-1-carbaldehyde 
• 574-19-6 1-(2-hydroxy-1-naphthyl)ethan-1-one 
• 64-17-5 ethanol 
• 563-41-7 semicarbazide hydrochloride 
• 127-09-3 sodium acetate 
• 152153-27-0 2-hydroxy-1-naphthoylacetone 
• 108-24-7 acetic anhydride 
• 64-19-7 acetic acid 
• 7664-93-9 sulfuric acid 
• 141-97-9 ethyl acetoacetate 
• 135-19-3 β-naphthol 
• 5891-83-8 2-acetyl-3-methyl-benzo[f]chromen-1-one 

Downstream Products

• 105591-53-5 C₂₂H₁₈N₂O₃ 

Relevant articles and documents

Infrared Spectra and Theoretical Study of Methyl, Formyl and Acetyl Derivatives of Chromones

The C=O stretching frequencies of substituted 2-methylchromones (3a-j), 2-formylchromones (4a-j), 3-formylchromones (5a-j) and 3-acetyl-2-methylchromones (6a-i) were measured in CCl4 and CHCl3 and correlated with ?+ substituent constants.Using the results of the infrared spectral investigation and the theoretical calculations by the semiempirical AM1 methd, the conformation and the transmission of electronic effects in compounds 4-6 were studied.For the 2-substituted chromone system the transmission factory γ according to the definition of Charton was determined.The preparation of some new 2-methylchromones (3e-j) and 3-(2,2-diformyl-chlorovinyl)-6-methylchromone (7) is also described. Key words: 2-Methyl-, 2-formyl-, 3-formyl-, and 3-acetyl-2-methylchromones; infrared spectra; AM1 calculations; conformation; transmission of substituent effects.

Tandem reactions leading to bicyclic pyrimidine nucleosides and benzopyran-4-ones

A novel, rapid, and efficient synthesis of bicyclic pyrimidine nucleosides and benzopyran-4-ones through oxidation of homopropargyl alcohols and subsequent isomerization, intramolecular addition of enol to allenic ketone has been developed. This methodology provides an efficient and promising approach to the structurally and pharmaceutically interesting pyrano[2,3-d]pyrimidine-2,5-dione nucleoside and benzopyran-4-one derivatives.

Photochemical transformations in 1-(o-hydroxyaryl)-1,3-diketones

Irradiation (using pyrex glass filter) of o-hydroxybenzoylacetophenone (1a), o-hydroxybenzoylacetone (1b), 2-hydroxy-1-naphthoylacetophenone (5a), 2-hydroxy-1-naphthoylacetone (5b) and 1-hydroxy-2-naphthoylacetone (9) in Br2/CHCl3 and I2/MeOH solutions leads to various chromone derivatives.Parallel reactions of these 1,3-diketones in the dark record no perceptible change in them.Enhanced photoenolisation of the diketones, in the presence of bromine or iodine, is deemed to be the key step in these transformations.