Efficient and Reliable Iodination and O-Methylation of Fluorinated Phenols
作者:Robert Francke、Gregor Schnakenburg、Siegfried R. Waldvogel
DOI:10.1002/ejoc.201000161
日期:2010.4
Fluorinatedphenols and other electron-deficient phenolic substrates are efficiently and cleanly iodinated by an iodine/ iodide mixture employing alkaline conditions. This protocol turned out to be the most practical for the generation of such highly fluorinated iodophenols. For later application in coupling processes the protection of the phenolic hydroxy moiety is often required. Therefore, a practical
Synthesis of Highly Fluorinated 2,2′-Biphenols and 2,2′-Bisanisoles
作者:Robert Francke、Gregor Schnakenburg、Siegfried R. Waldvogel
DOI:10.1021/ol101698a
日期:2010.10.1
Multiply fluorine-substituted iodo anisoles are efficiently coupled in an Ullmann-type reaction to provide the corresponding bisanisoles. The coupling is selective and even tolerates bromo moieties. Subsequent deprotection of hydroxy groups gives access to highly fluorinated biphenols.