Cas no 2381-87-5 (4-methyl-5,6-dihydro-2H-pyran-2-one)

4-Methyl-5,6-dihydro-2H-pyran-2-one is a cyclic ester (lactone) with a six-membered ring structure, featuring a methyl substituent at the 4-position. This compound is of interest in organic synthesis due to its reactivity as a versatile building block for heterocyclic frameworks. Its unsaturated lactone moiety allows for selective functionalization, making it useful in the preparation of fragrances, pharmaceuticals, and agrochemical intermediates. The compound's stability under standard conditions and compatibility with various reaction conditions enhance its utility in multi-step synthetic routes. Its structural features also enable applications in asymmetric synthesis and catalysis, where precise control over stereochemistry is required.

4-methyl-5,6-dihydro-2H-pyran-2-one structure

2381-87-5 structure

Product Name:4-methyl-5,6-dihydro-2H-pyran-2-one

CAS No:2381-87-5

MF:C₆H₈O₂

MW:112.126522064209

MDL:MFCD28969021

CID:268871

PubChem ID:557445

Update Time:2025-06-07

4-methyl-5,6-dihydro-2H-pyran-2-one Chemical and Physical Properties

Names and Identifiers

- 2H-Pyran-2-one,5,6-dihydro-4-methyl-
- 4-methyl-2,3-dihydropyran-6-one
- 2,3-Anhydromevalonic acid &#948
- 2-anhydro-
- 2-Pentenoic acid, 5-hydroxy-3-methyl-, lactone
- 5,6-Dihydro-4-methyl-(2H)-pyran-2-one, dehydromevalonic acid lactone
- -lactone
- Mevalonic lactone, &#916
- 4-methyl-5,6-dihydro-2H-pyran-2-one
- Dehydromevalonolactone
- Q63399355
- D93039
- AS-77246
- InChI=1/C6H8O2/c1-5-2-3-8-6(7)4-5/h4H,2-3H2,1H
- EN300-21001769
- RPEASMBMVIKUTH-UHFFFAOYSA-N
- 2381-87-5
- Dehydromevalonic lactone
- 4-Methyl-5,6-dihydro-2H-pyran-2-one #
- Mevalonic lactone, .DELTA.2-anhydro-
- DTXSID50178526
- 4-METHYL-5,6-DIHYDRO-2-PYRONE
- 2,3-Anhydromevalonic acid .delta.-lactone
- ghl.PD_Mitscher_leg0.315
- 5,6-dihydro-4-methyl-2h-pyran-2-one
- AKOS025296214
- 4-methyl-2, 3-dihydropyran-6-one
- 4-methyl-5,6-dihydro-pyran-2-one
- 2,3-Anhydromevalonic acid
- 2H-Pyran-2-one, 5,6-dihydro-4-methyl-
- SCHEMBL125458
- MDL： MFCD28969021
- Inchi： 1S/C6H8O2/c1-5-2-3-8-6(7)4-5/h4H,2-3H2,1H3
- InChI Key： RPEASMBMVIKUTH-UHFFFAOYSA-N
- SMILES： O1C(C=C(C)CC1)=O

Computed Properties

Exact Mass: 112.05244
Monoisotopic Mass: 112.052
Isotope Atom Count: 0
Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 2
Heavy Atom Count: 8
Rotatable Bond Count: 0
Complexity: 136
Covalently-Bonded Unit Count: 1
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count : 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Surface Charge: 0
Tautomer Count: nothing
XLogP3: 0.6
Topological Polar Surface Area: 26.3?2

Experimental Properties

Density: 1.065
Boiling Point: 234.8°Cat760mmHg
Flash Point: 89.7°C
Refractive Index: 1.464
PSA: 26.3

4-methyl-5,6-dihydro-2H-pyran-2-one Pricemore >>

Related Categories	No.	Product Name	Cas No.	Purity	Specification	Price	update time
eNovation Chemicals LLC	D963586-100mg	2H-Pyran-2-one,5,6-dihydro-4-methyl-	2381-87-5	95%	100mg	$995	2024-06-07
eNovation Chemicals LLC	D963586-250mg	2H-Pyran-2-one,5,6-dihydro-4-methyl-	2381-87-5	95%	250mg	$1420	2024-06-07
eNovation Chemicals LLC	D963586-1g	2H-Pyran-2-one,5,6-dihydro-4-methyl-	2381-87-5	95%	1g	$2865	2024-06-07
Enamine	EN300-21001769-0.05g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	0.05g	$493.0	2023-09-16
Enamine	EN300-21001769-0.1g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	0.1g	$644.0	2023-09-16
Enamine	EN300-21001769-0.25g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	0.25g	$920.0	2023-09-16
Enamine	EN300-21001769-0.5g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	0.5g	$1449.0	2023-09-16
Enamine	EN300-21001769-1.0g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	1g	$1857.0	2023-06-02
Enamine	EN300-21001769-2.5g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	2.5g	$3641.0	2023-09-16
Enamine	EN300-21001769-5.0g	4-methyl-5,6-dihydro-2H-pyran-2-one	2381-87-5	95%	5g	$5387.0	2023-06-02