Methyl coumalate, 98%
Methyl coumalate, 98%
Methyl coumalate, 98%
Thermo Scientific Chemicals

Methyl coumalate, 98%

CAS: 6018-41-3 | C7H6O4 | 154.121 g/mol
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10 g
Catalog number B25330.04
also known as B25330-04
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2 g
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Chemical Identifiers
CAS6018-41-3
IUPAC Namemethyl 2-oxo-2H-pyran-5-carboxylate
Molecular FormulaC7H6O4
InChI KeyHHWWWZQYHPFCBY-UHFFFAOYSA-N
SMILESCOC(=O)C1=COC(=O)C=C1
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SpecificationsSpecification SheetSpecification Sheet
Appearance (Color)White to cream to pale yellow
Melting Point (clear melt)66.0-73.0?C
Identification (FTIR)Conforms
Assay (GC)≥97.5%
FormPowder
Methyl coumalate is a 2-pyrone and acts as dienophile in Diels-Alder reaction. It reacts with 1,3-butadienes at 100°C to yield tetrahydrocoumarins and 4-methoxycarbonyltricyclo[3.2.1.02,7]octenes. It also reacts with cyclohexadiene to afford tetrahydronaphthalene-2-carboxylate. It undergoes Diels-Alder reaction with unactivated alkenes to afford para-substituted adducts. It has been used as reagent in phosphine-catalyzed [4+3] annulation of modified allylic carbonates. It was also used in the preparation of 7-carboxyquinolizinium derivatives.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Methyl coumalate is a 2-pyrone and acts as dienophile in Diels-Alder reaction. It reacts with 1,3-butadienes at 100°C to yield tetrahydrocoumarins and 4-methoxycarbonyltricyclo[3.2.1.02,7]octenes. It also reacts with cyclohexadiene to afford tetrahydronaphthalene-2-carboxylate. It undergoes Diels-Alder reaction with unactivated alkenes to afford para-substituted adducts. It has been used as reagent in phosphine-catalyzed [4+3] annulation of modified allylic carbonates. It was also used in the preparation of 7-carboxyquinolizinium derivatives.

Solubility
Freely soluble in dichloromethane.

Notes
Stable under recommended storage conditions. Incompatible with oxidizing agents.
RUO – Research Use Only

General References:

  1. Suqing Zheng; Xiyan Lu. Phosphine-catalyzed [4 + 3] annulation for the synthesis of highly functionalized bicyclo[3.2.2]nonadienes. Organic Letters. 2009, 11,(17), 3978-3981.
  2. Richard H.Wiley; Newton R.Smith; Louis H.Knabeschuh. Quinolizinium compounds by cyclization of pyridones from methyl coumalate and β-phenylethylamines. J. Am. Chem. Soc. 1953, 75,(18), 4482-4484.