There has been much effort to develop novel methods of fluorination, because fluorine-containing molecules have become increasingly important in scientific and industrial fields.1 Diethylaminosulfur trifluoride (DAST), an agent converting aliphatic alcohols or silyl ethers into alkyl fluorides under mild conditions, is one of the most con- venient reagents in organic synthesis.2 There have been several reports concerning new fluorinating methods using DAST.3±15 Among these ...
