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Trifluoroacetylation of ethyl 2,4-dioxopentanoate. The first synthesis of 4-oxo-6-(trifluoromethyl)-4H-pyran-2-carboxylic acid and its derivatives

✍ Scribed by B. I. Usachev; I. A. Bizenkov; V. Ya. Sosnovskikh


Publisher
Springer
Year
2007
Tongue
English
Weight
222 KB
Volume
56
Category
Article
ISSN
1573-9171

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✍ Jiang-Hong Wang; Yu-Quan Shen πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 126 KB πŸ‘ 2 views

Two new derivatives of 4-dicyanomethylene-2,6-dimethyl-4H-pyran were synthesized and characterised. The fluorescence intensity, quantum yield and emission wavelength of these derivatives are reported. Films made from poly(amic acid) with the corresponding chromophore covalently bound show better flu