Preparation of iodonium ylides: probing the fluorination of 1,3-dicarbonyl compounds with a fluoroiodane

Abstract

The isolated iodonium ylide has been reacted successfully with TREAT-HF, hydrochloric acid, acetic acid and <italic>p</italic>-toluenesulfonic acid to form the 2-fluoro-, 2-chloro-, 2-acetyl- and 2-tosyl-1,3-ketoesters respectively.