Compound: 3,4-Dihydro-2H-pyran
SMILES: O1C=CCCC1
InChIKey: BUDQDWGNQVEFAC-UHFFFAOYSA-N
Synonyms: 3,4-Dihydro-2H-pyran, 110-87-2, DIHYDROPYRAN, 3,4-Dihydropyran, 2,3-Dihydro-4H-pyran, 2H-3,4-Dihydropyran, 5,6-Dihydro-4H-pyran, 2H-Pyran, 3,4-dihydro-, delta2-Dihydropyran, Pyran, dihydro-, T6V9N71IHX, DTXSID6041426, NSC-57860, NSC-73472, DTXCID4021426, RefChem:91085, 2,3-DIHYDRO-GAMMA-PYRAN, 203-810-4, Dihydro-2H-pyran, 2,3-Dihydropyran, 2H-Pyran, dihydro-, dihydropyrane, MFCD00006558, .delta.2-Dihydropyran, 3,4-Dihydro-2-pyran, NSC 57860, 1,2-Pyran, 3,4-dihydro-, WLN: T6O BUTJ, 2,3-dihydropyrane, Dihydropyran (VAN), 3,4-dihydro-2H-pyrane, UNII-T6V9N71IHX, dihyrdopyran, dihyropyran, Dihydro-2h-pyran, 3,4-, 2,3dihydropyran, 2,3-dihyropyran, 2,4-dihydropyran, 4,5-dihydropyran, 3,4-dihydropyrane, EINECS 203-810-4, 2,3-dihydro-pyran, 3,4-dihydro-pyran, UN2376, 3,4dihydro-2H-pyran, 3,4-dihyro-2H-pyran, Pyran, 2,3-dihydro-, 3,4-dihydro-2h pyran, AI3-16497, 3, 4dihydro-2H-pyran, 3,4 dihydro-2H-pyran, 3,4-dihydro 2H-pyran, 3,4-dihydro-1H-pyran, 3.4-dihydro-2H-pyran, 2,3-dihydro-4H-pyrane, 3,4-Dihdro-2H-pyrane, 3,4-Dihydro(2H)pyran, DIHYDROPYRAN [MI], 2,3-dihydro-4-H-pyran, 3,4- dihydro-2H-pyran, 3,4-dihydro-2 H-pyran, 3,4-dihydro-2-H-pyran, 3,4-dihydro-2H -pyran, 3,4-dihydro-2-H-pyrane, EC 203-810-4, SCHEMBL3784, SCHEMBL3785, SCHEMBL9398, 3,4-dihydro-[2H]-pyran, .delta.(Sup2)-Dihydropyran, 3,4 - Dihydro-2H-pyran, SCHEMBL234707, SCHEMBL236062, SCHEMBL236463, SCHEMBL236759, SCHEMBL1994644, CHEMBL3184439, SCHEMBL16007902, SCHEMBL17491064, SCHEMBL17491071, SCHEMBL23326991, SCHEMBL23364567, 3,4-Dihydro-2H-pyran, 97%, 2-PYRAN, 3,4-DIHYDRO-, AAA11087, NSC57860, NSC73472, STR01188, 2,3-DIHYDRO-.GAMMA.-PYRAN, Tox21_301188, SBB060381, STL146593, AKOS000121126, CS-W013755, NCGC00248323-01, NCGC00255086-01, BP-21473, CAS-110-87-2, DB-002492, D0555, NS00003641, ST51046572, EN300-26571, D78128, 2,3-Dihydropyran [UN2376]  [Flammable liquid], 3,4-Dihydro-2H-pyran, purum, >=95.0% (GC), F130700, Q419349, F0001-0228, InChI=1/C5H8O/c1-2-4-6-5-3-1/h2,4H,1,3,5H, 5,6-Dihydro-4H-pyran; DHP; 5,6-Dihydro-4H-pyran; Dihydropyran
Theoretical properties:
molecular_formula: C5H8O
molecular_weight: 84.12 g/mol
exact_mass: 84.057514874 g/mol
formal_charge: 0
hydrogen_bond_donor_count: 0
hydrogen_bond_acceptor_count: 1
rotatable_bond_count: 0
heavy_atom_count: 6
topological_polar_surface_area: 9.2 Å²
isotope_atom_count: 0
covalently_bonded_unit_count: 1
Physical properties:
flash_point: 0 °F (NFPA, 2010)
Descriptions:
chembl: Unnamed Compound is a small molecule listed in the ChEMBL database but has not progressed to an approved clinical phase.
wikipedia: In chemistry, pyran is a six-membered heterocyclic, non-aromatic ring, consisting of five carbon atoms and one oxygen atom and containing two double bonds. The molecular formula is C5H6O. There are two isomers of pyran that differ by the location of the double bonds. In 2H-pyran, the saturated carbon is at position 2, whereas, in 4H-pyran, the saturated carbon is at position 4. "Oxine” is not used for pyran because it has been used as a trivial name for quinolin-8-ol.
4H-Pyran was first isolated and characterized in 1962 via pyrolysis of 2-acetoxy-3,4-dihydro-2H-pyran. It was found to be unstable, particularly in the presence of air. 4H-pyran easily disproportionates to the corresponding dihydropyran and the pyrylium ion, which is easily hydrolyzed in aqueous medium.
Although the pyrans themselves have little significance in chemistry, many of their derivatives are important biological molecules, such as the pyranoflavonoids.
The term pyran is also often applied to the saturated ring analog, which is more properly referred to as tetrahydropyran (oxane).  In this context, the monosaccharides containing a six-membered ring system are known as pyranoses.