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Preparation of Alkyl and Aryl Chlorodifluoromethyl Ethers Using BrF3
作者:Youlia Hagooly、Revital Sasson、Michael J. Welch、Shlomo Rozen
DOI:10.1002/ejoc.200800231
日期:2008.6
Both alkyl and aryl chlorothioformates could readily be obtained from the corresponding alcohols and thiophosgene. These families of compounds were treated with BrF3 to form the corresponding alkyl and arylchlorodifluoromethylethers in 60–85 % yields. The method is suitable for constructing a variety of aliphatic as well as electron-deficient aromatic chlorodifluoromethylethers. The reactions proceed
Pyridine•BrF<sub>3</sub>, the Missing Link for Clean Fluorinations of Aromatic Derivatives
作者:Youlia Hagooly、Shlomo Rozen
DOI:10.1021/ol3000348
日期:2012.2.17
This work demonstrates the unique features of the never used before Py center dot BrF3 complex in the field of aromatic organic fluorinations. The main disadvantage of the noncomplexed BrF3 is the fact that usually, in addition to the desired fluorination, a parallel electrophilic aromatic bromination takes place as well. Use of the Py center dot BrF3 complex reduces this electrophilic bromination, which is observed with most reagents based on fluorine and bromine [BrF].