Open AccessThis article is
- freely available
Reaction of Iodonium Ylides of 1,3-Dicarbonyl Compounds with HF Reagents
Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University, Honjo-machi, Saga 840-8502, Japan
* Author to whom correspondence should be addressed.
Received: 7 May 2012; in revised form: 29 May 2012 / Accepted: 29 May 2012 / Published: 31 May 2012
Abstract: Reaction of dibenzoylmethane with (diacetoxyiodo)benzene in the presence of KOH in MeCN quantitatively gave the corresponding iodonium ylide, which was treated with a HF reagent to afford the corresponding 2-fluorinated dibenzoylmethane in 14–50% yields. The similar reaction of the iodonium ylides obtained from 1-phenylbutan-1,3-dione, ethyl benzoylacetate, and ethyl p-nitrobenzoylacetate with TEA·3HF gave the corresponding fluorinated products in 17–34% yields. It is suggested that the fluorinated products were formed through the C-protonation of the ylide, followed by displacement with fluoride ion. The same reaction of the iodonium ylide of dibenzoylmethane with concentrated HCl gave the corresponding chlorinated product in 45% yield.
Keywords: iodonium ylide; hypervalent iodine; dibenzoylmethane; 1,3-dicarbonyl compound; fluorination; chlorination
Article StatisticsClick here to load and display the download statistics.
Notes: Multiple requests from the same IP address are counted as one view.
Cite This Article
MDPI and ACS Style
Gondo, K.; Kitamura, T. Reaction of Iodonium Ylides of 1,3-Dicarbonyl Compounds with HF Reagents. Molecules 2012, 17, 6625-6632.
Gondo K, Kitamura T. Reaction of Iodonium Ylides of 1,3-Dicarbonyl Compounds with HF Reagents. Molecules. 2012; 17(6):6625-6632.
Gondo, Keisuke; Kitamura, Tsugio. 2012. "Reaction of Iodonium Ylides of 1,3-Dicarbonyl Compounds with HF Reagents." Molecules 17, no. 6: 6625-6632.