The Question of Electrophilic vs Nucleophilic Addition of Cyclic beta-Dicarbonyl Phenyliodonium Ylides: Electrophilic Cycloaddition of Diphenylketene

 
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2012 (EN)
The Question of Electrophilic vs Nucleophilic Addition of Cyclic beta-Dicarbonyl Phenyliodonium Ylides: Electrophilic Cycloaddition of Diphenylketene (EN)

A. Antos, (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
A. Antos, (EN)

The reaction of Ξ²-dicarbonyl phenyliodonium ylides with diphenylketene at room temperature affords mixtures of lactone and aurone derivatives. The initial electrophilic attack of the iodonium ylide on the CΞ² position of the diphenylketene, followed by cyclization of the zwitterionic species, and subsequent ejection of iodobenzene, affords the lactone and aurone cycloadducts. Treatment of Ξ²-dicarbonyl iodonium ylides with acyl chlorides yields Ξ±-chloroenones with good to excellent yields. (EN)

Πανεπιστήμιο Ιωαννίνων (EL)
University of Ioannina (EN)

J. Org. Chem. (EN)

English

2012


American Chemical Society (EN)



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