76897-39-7

Basic information

• Product Name: 3,4-dihydro-4,4-dimethyl-2H-pyran-2-one
• Synonyms: 3,4-Dihydro-4,4-dimethyl-2H-pyran-2-one; 4,4-dimethyl-3,4-dihydro-2H-pyran-2-one
• CAS NO: 76897-39-7
• Molecular Formula: C₇H₁₀O₂
• Molecular Weight: 126.1531
• EINECS: 278-566-5
• Mol File: 76897-39-7.mol

Chemical Properties

• Boiling Point: 196°C at 760 mmHg
• Flash Point: 69.3°C
• Density: 1.003g/cm³
• Vapor Pressure: 0.408mmHg at 25°C
• Refractive Index: 1.449
• CAS DataBase Reference: 3,4-dihydro-4,4-dimethyl-2H-pyran-2-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-dihydro-4,4-dimethyl-2H-pyran-2-one(76897-39-7)
• EPA Substance Registry System: 3,4-dihydro-4,4-dimethyl-2H-pyran-2-one(76897-39-7)

Safety Data

• Hazardous Substances Data: 76897-39-7(Hazardous Substances Data)

Upstream product

• 76897-38-6 ethyl 4-formyl-3,3-dimethylbutanoate 
• 77514-27-3 3,3-dimethyl-5-oxopentanoic acid 
• 104773-66-2 (E)-5-Acetoxy-3,3-dimethyl-pent-4-enoic acid ethyl ester 
• 104773-64-0 methyl 5-acetoxy-3,3-dimethyl-4-pentenoate 

Downstream Products

• 116053-49-7 C₁₃H₁₄O₄ 
• 116053-48-6 3,3-Dimethyl-4-oxo-butyric acid (4-hydroxy-phenoxy)-(4-hydroxy-phenyl)-methyl ester 
• 4046-03-1 2-methyl-5-phenyl-[1,3,4]oxadiazole 
• 103-71-9 phenyl isocyanate 
• 126186-97-8 5,5-dimethyl-2,7-dioxabicyclo<4.1.0>heptan-3-one 
• 128259-80-3 (5S,6R)-6-Fluoro-4,4-dimethyl-5-phenylselanyl-tetrahydro-pyran-2-one 
• 136557-91-0 5,5-Dimethyl-2-nitro-2-cyclohexen-1-on 

Relevant articles and documents

FACILE SYNTHESIS OF 3,4-DIHYDRO-4,4-DIMETHYL-2H-PYRAN-2-ONE VIA PALLADIUM CATALYZED TERMINAL OXIDATION OF 3,3-DIMETHYL-4-PENTENOATES

Selective terminal oxidation of 3,3-dimethyl-4-pentenoates does occur under chloride-free Wacker conditions in AcOH to give 5-acetoxy-3,3-dimethyl-4-pentenoates (7) and their analogues (2,8) in good yields.Successive cyclization of 7 and 8 at vapor phase pyrolysis on SiO2 affords 3,4-dihydro-4,4-dimethyl-2H-pyran-2-one (1).

Derivatives of 2H-pyran-2-one

Processes for producing a (1α, 4α, 5α)-6,6-dimethyl-4-halo-substituted-methyl-3-oxabicyclo[3.1.0]hexan-2-one and its novel intermediates from known and inexpensive starting materials are described and exemplified.

Bicyclic lactone derivatives

Novel intermediates for production of insecticidal cis-3-(2,2-disubstituted-ethenyl)-2,2-dimethylcyclopropanecarboxylates, processes for preparing the intermediates, and processes for preparing the final product insecticides via a novel bicyclic lactone intermediate are described and exemplified.