| Identification | Back Directory | [Name]
ALPHA-PYRONE | [CAS]
504-31-4 | [Synonyms]
α-Pyron
cumalin
2-Pyrone
Coumalin
α-pyrone
2-Pyranone
pyran-2-one
ALPHA-PYRONE
Pyrone,alpha-
2H-PYRAN-2-ONE
2H-Pyran, 2-oxo-
chloro-4’phenyl-
2H-PYRAN-2-ONE 99%
2H-Pyran-2-one,97%
2H-Pyran-2-one,99%
2H-Pyran-2-one, 97% 5GR
2,4-Pentadienoic acid, 5-hydroxy-, delta-lactone
chloro-4’phenyl-4methyl-6phenyl-3tetrahdyro-3,4,5,6pyrone-6(3r*,4s*,6r*
4-beta,6-alpha)-tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-2h-(3-alph
2h-pyran-2-one,tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-be
tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-beta,6-alpha)-2h-pyran-2-on | [EINECS(EC#)]
207-990-5 | [Molecular Formula]
C5H4O2 | [MDL Number]
MFCD00006639 | [MOL File]
504-31-4.mol | [Molecular Weight]
96.08 |
| Chemical Properties | Back Directory | [Appearance]
clear yellow to brown liquid | [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.)
| [Fp ]
94 °C
| [storage temp. ]
Refrigerator (+4°C) | [form ]
Liquid | [color ]
Clear yellow to brown | [Odor]
Pleasant hay-like, herbaceous-warm odor | [BRN ]
1511 | [LogP]
-0.645 (est) |
| Hazard Information | Back Directory | [Chemical Properties]
clear yellow to brown liquid | [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 |
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