7-???-4-?????
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7-???-4-????? ??
- ???
- 114-116 °C (lit.)
- ?? ?
- 351.4±37.0 °C(Predicted)
- ??
- 1.163±0.06 g/cm3(Predicted)
- ?? ??
- -20°C Freezer, Under inert atmosphere
- ???
- ? ???DMF
- ??? ??
- ??
- ??? ??
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- ???? ?????
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- 100.00%??. ??? ??
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- ???
- BRN
- 169998
- LogP
- 2.973 (est)
- CAS ??????
- 87-05-8(CAS DataBase Reference)
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- ?? ? ???? ?? (GHS)
7-???-4-????? C??? ??, ??, ??
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White solid; walnut odor. Slightly soluble in alcohol.??
Perfumery, flavoring.?? ??
7-Ethoxy-4-methylcoumarin (EtOMC), also known as ethyl 4-methylumbelliferyl ether, is a coumarin derivative. Its standard molar energy of combustion is ?5888.0 ± 3.2kJ·mol?1 and standard molar enthalpy of formation in the crystalline phase is ?545.4 ± 3.6kJ·mol?1.EtOMC can be prepared by reacting methyl acetoacetate with 3-ethoxyphenol in the presence of boron trifluoride dihydrate.The fluorescence quenching of EtOMC is more effective in the presence 4-hydroxy-TEMPO (4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl).Synthesis
Prod.:1) from Diketene plus Resorcinol with sulfuric acid to produce 4-Methyl-7-hydroxy - coumarin. Ethylation produces subject material.
2) from Resorcinol plus Ethylacetoacetate, followed by Ethylation.
7-???-4-????? ?? ?? ? ???
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7-???-4-????? ?? ??
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