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ALPHA-PYRONE

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ALPHA-PYRONE Basic information

Product Name:
ALPHA-PYRONE
Synonyms:
  • chloro-4’phenyl-4methyl-6phenyl-3tetrahdyro-3,4,5,6pyrone-6(3r*,4s*,6r*
  • Coumalin
  • pyran-2-one
  • 2H-PYRAN-2-ONE
  • α-pyrone
  • cumalin
  • tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-beta,6-alpha)-2h-pyran-2-on
  • α-Pyron
CAS:
504-31-4
MF:
C5H4O2
MW:
96.08
EINECS:
207-990-5
Product Categories:
  • Building Blocks
  • Chemical Synthesis
  • Heterocyclic Building Blocks
  • Pyrans
Mol File:
504-31-4.mol
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ALPHA-PYRONE Chemical Properties

Melting point:
8-9 °C
Boiling point:
102-103 °C20 mm Hg(lit.)
Density 
1.197 g/mL at 25 °C(lit.)
refractive index 
n20/D 1.53(lit.)
Flash point:
94 °C
storage temp. 
2-8°C
form 
Liquid
color 
Clear yellow to brown
Odor
Pleasant hay-like, herbaceous-warm odor
BRN 
1511
LogP
-0.645 (est)
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Safety Information

Safety Statements 
23-24/25
WGK Germany 
3
F 
8-9-23
HS Code 
29322090

MSDS

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ALPHA-PYRONE Usage And Synthesis

Chemical Properties

clear yellow to brown liquid.
Polymerizes easily upon standing, particularly under alkaline conditions. Very slightly soluble in water, soluble in alcohol and oils.

Definition

ChEBI: 2H-pyran-2-one is the simplest member of the class of 2-pyranones that is 2H-pyran with an oxo substituent at position 2.

Synthesis Reference(s)

Journal of the American Chemical Society, 90, p. 2318, 1968 DOI: 10.1021/ja01011a020
Organic Syntheses, Coll. Vol. 6, p. 462, 1988

General Description

2H-Pyran-2-one (a-Pyrone) is a heterocyclic building block. Photochemistry of 2H-pyran-2-one has been investigated by laser flash photolysis with infrared detection. Ketene and a bicyclic lactone were obtained as major photoproducts.

Purification Methods

Dissolve -pyrone in Et2O, wash it with brine, dry (Na2SO4), f

ALPHA-PYRONESupplier

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