A Simple Base-Mediated Halogenation of Acidic sp<sup>2</sup> C−H Bonds under Noncryogenic Conditions
作者:Hien-Quang Do、Olafs Daugulis
DOI:10.1021/ol802411f
日期:2009.1.15
A new method has been developed for in situ halogenation of acidic Sp(2) carbon-hydrogen bonds in heterocycles and electron-deficient arenes. Either selective monohalogenation or one-step exhaustive polyhalogenation is possible for substrates possessing several C-H bonds that are flanked by electron-withdrawing groups. For the most acidic arenes, such as pentafluorobenzene, K3PO4 base can be employed instead of BuLi for metalation/halogenation sequences.
ACTIVE IONIC LIQUID MIXTURES FOR OXIDIZING ALKYLAROMATIC COMPOUNDS
申请人:UOP LLC
公开号:US20150094486A1
公开(公告)日:2015-04-02
Ionic liquid compositions derived from imidazolium based ionic liquids that have been thermally treated or thermally and oxidatively treated are disclosed. These compositions can be utilized as the medium for oxidation of alkylaromatic compounds and their oxidized derivatives or as a medium for purification of aromatic carboxylic acids.