From Wikipedia, the free encyclopedia
4-Chromone; 1,4-Benzopyrone; 4H-Chromen-4-one; Benzo-gamma-pyrone; 4H-1-Benzopyran-4-one; 1-Benzopyran-4-one; 4H-Benzo(b)pyran-4-one
3D model (Jmol)
|Molar mass||146.15 g·mol−1|
|Acidity (pKa)||-2.0 (of conjugate acid)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Derivatives of chromone are collectively known as chromones. Most, though not all, chromones are also phenylpropanoids.
- 6,7-dimethoxy-2,3-dihydrochromone has been isolated from Sarcolobus globosus.
- Eucryphin, a chromone rhamnoside, can be isolated from the bark of Eucryphia cordifolia.
- Cromolyn (disodium cromoglicate) was found to inhibit antigen challenge as well as stress induced symptoms. Cromoglicate is used as a mast cell stabilizer in allergic rhinitis, asthma and allergic conjunctivitis.
- Nedocromil sodium was found to have a somewhat longer half-life than cromolyn; however, production was discontinued in the US in 2008.
- Eucryphin, a new chromone rhamnoside from the bark of Eucryphia cordifolia. R. Tschesche, S. Delhvi, S. Sepulveda and E. Breitmaier, Phytochemistry, Volume 18, Issue 5, 1979, pages 867-869, doi:10.1016/0031-9422(79)80032-1
- HOWELL, J.B. & ALTOUNYAN, R.E. (1967). A double-blind trial of disodium cromoglycate in the treatment of allergic bronchial asthma. Lancet, 2, 539–542. Abstract