4940-17-4

Basic information

• Product Name: 2-butyl-3-hydroxy-4H-pyran-4-one
• Synonyms: 2-Butyl-3-hydroxy-4H-pyran-4-one; 4H-Pyran-4-one, 2-butyl-3-hydroxy-
• CAS NO: 4940-17-4
• Molecular Formula: C₉H₁₂O₃
• Molecular Weight: 168.1898
• Mol File: 4940-17-4.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 311.4°C at 760 mmHg
• Flash Point: 125.5°C
• Density: 1.166g/cm³
• Vapor Pressure: 4.99E-05mmHg at 25°C
• Refractive Index: 1.525
• CAS DataBase Reference: 2-butyl-3-hydroxy-4H-pyran-4-one(CAS DataBase Reference)
• NIST Chemistry Reference: 2-butyl-3-hydroxy-4H-pyran-4-one(4940-17-4)
• EPA Substance Registry System: 2-butyl-3-hydroxy-4H-pyran-4-one(4940-17-4)

Safety Data

• Hazardous Substances Data: 4940-17-4(Hazardous Substances Data)

Upstream product

• 30478-77-4 1-(furan-2-yl)pentan-1-ol 

Relevant articles and documents

Maltol and homolog preparation method by means of molecular oxygen oxidation

The invention provides a maltol and homolog preparation method by means of molecular oxygen oxidation. The method comprises the following steps of charging, a first-stage oxidation reaction, a second-stage oxidation reaction and hydrolysis. According to the first-stage oxidation reaction, alpha-furyl alcohol is used as a raw material, gas with an oxygen content of 15%-85% is used as an oxidizing agent, a heteroatom molecular sieve and basic resin are used as a composite catalyst in a solvent, and an oxidizing ring opening rearrangement reaction is conducted at the temperature of 50-160 DEG C; according to the second-stage oxidation reaction, the temperature drops to 10-40 DEG C, gas with an oxygen content of 90% or above is pumped in, an epoxidation reaction is conducted, and the temperature of the reaction is kept for 0.5-3 h. According to the method, the production yield reaches 50% or above, and the production yield reaches 67% or above in the condition of optimization; the oxidation reaction conducted by using molecular oxygen has the advantages of energy conservation, low cost and environmental protection, and recycling and application of the catalysts are easier to achieve by means of the composite catalyst made from the heteroatom molecular sieve and the basic resin.

Process for preparing 3-oxy-4H-pyran-4-one derivatives

A process for preparing a 3-oxy-4H-pyran-4-one derivative which comprises the steps of: 1. epoxidizing a 3-oxo-3,6-dihydro-2H-pyran derivative with a peroxide to obtain a 4,5-epoxy-3-oxotetrahydropyran derivative, and 2. heating the 4,5-epoxy-3-oxotetrahydropyran derivative.