Coffee furanone
Names | |
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IUPAC name
2-Methyldihydrofuran-3(2H)-one | |
Other names
2-Methyltetrahydrofuran-3-one; 2-Methyl-3-oxotetrahydrofuran; 2-Methyltetrahydro-3-furanone; Dihydro-2-methyl-3-furanone; 2-Methyloxolan-3-one | |
Identifiers | |
3188-00-9 | |
3D model (Jmol) | Interactive image |
ChemSpider | 17494 |
ECHA InfoCard | 100.019.715 |
PubChem | 18522 |
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Properties | |
C5H8O2 | |
Molar mass | 100.12 g·mol−1 |
Density | 1.040 g/cm3 (20 °C) |
Boiling point | 139 °C (282 °F; 412 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Coffee furanone (2-methyltetrahydrofuran-3-one) is a pleasant smelling liquid furan derivative which is a volatile constituent of the aroma complex of roasted coffee.[1] Coffee furanone is less odorous than furfuryl mercaptan, which with an odor threshold of 0.005 ppb was the first high impact aroma chemical, but has a very pleasant sweet caramel character, with some nuttiness.[2]
Synthesis
Coffee furnone was synthesized in 1963 by Wynberg via acid-catalyzed ring closure of β-alkoxy diazoketones.[3] Coffee furanone has also been prepared via the condensation of ethyl lactate and methyl acrylate in DMSO solution[4] and (under phase transfer conditions) in ionic liquids.[5] A related lactic acid synthesis was described as having the advantages of a simple process, high conversion rate, low pollution, and low cost.[6] This compound has also been prepared in acceptable yield via oxidative hydroxylation of the 2-acetylbutyrolactone.[7] Further approaches to the synthesis of coffee furanone involved the hydrolysis of the corresponding dithioketals[8] and the oxidation of 2-methyltetrahydrofuran employing lithium hypochlorite in the presence of ruthenium catalysts.[9]
Applications
The synthetic version of this natural flavorant and odorant is used in a variety of food and beverage applications, including coffee, nuts, cocoa, brandy, meat sauces and as a general food flavorant at a typical dosage (about 5-20 ppm), similar to the natural concentration (30 ppm) of coffee furanone in roasted coffee.[10][11]
References
- ↑ M. A. Gianturco; Friedel, P.; Giammarino, A. S. (1964). "Volatile constituents of coffee. III. Structures of two heterocyclic compounds and the synthesis of tetrahydrofuranones". Tetrahedron. 20 (7): 1763–1772. doi:10.1016/s0040-4020(01)99177-x.
- ↑ Leo M. L. Nollet, Terri Boylston, "Handbook of meat, poultry and seafood quality" page 137-138 (2007)
- ↑ H. Wynberg (1963). "Tetrahydrofuran-3-one, spirans, and dithienyls". Angewandte Chemie. 75 (10): 453. doi:10.1002/ange.19630751014.
- ↑ M. A. Gianturco; Friedel, P.; Giammarino, A. S. (1964). "Volatile constituents of coffee. III. Structures of two heterocyclic compounds and the synthesis of tetrahydrofuranones". Tetrahedron. 20 (7): 1763–1772. doi:10.1016/s0040-4020(01)99177-x.
- ↑ Xiaogeng Liu; Chen, Yousheng (2005). "Synthesis of 2-methyltetrafuran-3-one from ethyl lactate and methyl acrylate.". Shipin Kexue (Beijing, China). 26 (5): 165–167.
- ↑ Cunzhao Cheng "Synthesis method of natural flavoring 2-methyltetrahydrofuran-3-one", Zhuanli Shenging Gonkai Shuomingshu, CN Patent 2009:1544311 (2009)
- ↑ Valentine Ragoussis; Lagouvardos, Dimitrios J.; Ragoussis, Nikitas (1998). "A short and efficient synthesis of 2-methyltetrahydrofuran-3-one". Synthetic Communications. 28 (22): 4273–4278. doi:10.1080/00397919809458708.
- ↑ Bonkoch Tarnchompoo; Thebtaranonth, Yodhathai (1984). "A condensed synthesis of dihydro-3(2H)-furanone". Tetrahedron Letters. 25 (48): 5567–70. doi:10.1016/s0040-4039(01)81628-2.
- ↑ Mario Bressan; Morvillo, Antonino; Romanello, Giorgio (1990). "Selective oxygenation of aliphatic ethers catalyzed by ruthenium(II) complexes". Inorganic Chemistry. 29 (16): 2976–2979. doi:10.1021/ic00341a024.
- ↑ M. A. Gianturco; Friedel, P.; Giammarino, A. S. (1964). "Volatile constituents of coffee. III. Structures of two heterocyclic compounds and the synthesis of tetrahydrofuranones". Tetrahedron. 20 (7): 1763–1772. doi:10.1016/s0040-4020(01)99177-x.
- ↑ R. Silwar; Kamperschroer, H.; Tressl, R. (1987). "Gas chromatographic-mass spectrometric study of roasted coffee aroma - quantitative determination of steam-volatile aroma constituents". Chemie, Mikrobiologie, Technologie der Lebensmittel. 10 (5-6): 176–187.