Fluorodesulfurization of aliphatic orthothioesters

In contrast with aromatic orthothio esters that undergo desulfurative fluorination to produce trifluoromethyl substituted aromatics, aliphatic orthothio esters react with BrF with replacement of only one or two methylthio groups by fluorine. An elimination step often follows the first sulfur replacement to produce novel unsaturated fluorinated systems. © 1999 John Wiley & Sons, Inc. Heteroatom Chem 10: 31–34, 1999