
TY  - JOUR
A1  - Sevenard, Dmitri V. 
A1  - Sosnovskikh, Vyacheslav Ya. 
A1  - Schroeder, Grzegorz 
A1  - Röschenthaler, Gerd-Volker 
T1  - 3-Polyfluoroacylmethylenephthalides: Synthesis and Structure
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2001
VL  - 54
IS  - 5
SP  - 335
EP  - 341
KW  - 
UR  - https://doi.org/10.1071/CH01086 
N2  - 3-Polyfluoroacylmethylenephthalides (RF = CF3, CF2CF2H, C2F5) can be synthesized conveniently by cyclodehydration of 1-(2-carboxyphenyl)-3-polyfluoroalkylpropane-1,3-diones, obtained from o-acetylbenzoic acid and polyfluorinated esters, as a separable mixture of Z- and E-isomers. In solution, the Z- and E-isomers of 3-polyfluoroacylmethylenephthalides are interconvertable. For CD3CN and (CD3)2SO solutions of 1-(2-carboxyphenyl)-3-polyfluoroalkylpropane-1,3-diones a ring&#8211;chain tautomerism is observed. The structures of the new compounds have been determined by heteronuclear nuclear magnetic resonance (NMR) spectroscopy and nuclear Overhauser effect (NOE) experiments. 
ER  -

