Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1315407 | Journal of Fluorine Chemistry | 2009 | 4 Pages |
The first synthesis of fluorine-containing 2-thienyliodonium salts was accomplished using cascade iodination–fluorination. According to this methodology, thiophene is first converted to bis(2-thienyl)iodonium hexafluorophosphate using an electrophilic iodination reaction. Upon heating with potassium fluoride, this salt undergoes regioselective fluorination producing 2-fluorothiophene. 2-Fluorothiophene is then iodinated again to yield fluorothienyliodonium salts.
Graphical abstractThe title method was successfully used for the preparation of 2-fluorothiophene and corresponding iodonium salts. The best results were achieved using thermolysis of hexafluorophosphates in the presence of KF.Figure optionsDownload full-size imageDownload as PowerPoint slide