Synthesis 2006(16): 2707-2718  
DOI: 10.1055/s-2006-942508
PAPER
© Georg Thieme Verlag Stuttgart · New York

3-(Polyhaloacyl)chromones and their Hetero Analogues: Synthesis and Reactions with Amines

Vyacheslav Ya. Sosnovskikh*, Roman A. Irgashev, Mikhail A. Barabanov
Department of Chemistry, Ural State University, 620083 Ekaterinburg, Russian Federation
Fax: +7(343)2615978; e-Mail: Vyacheslav.Sosnovskikh@usu.ru;
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Publikationsverlauf

Received 20 April 2006
Publikationsdatum:
19. Juli 2006 (online)

Abstract

2-Hydroxy-2-(polyhaloalkyl)chroman-4-ones react with diethoxymethyl acetate at 140-150 °C for 15 minutes to give 3-(polyhaloacyl)chromones in good yields. The reactions of these compounds with amines proceeds at C-2 with pyrone ring-opening and formation of 2-(alkyl/arylaminomethylene)-2-hydroxy-2-(polyfluoroalkyl)chroman-4-ones.