The first nickel-catalyzed C–H arylations and alkenylations of imidazoles with phenol and enol derivatives are described.
第一个镍催化的咪唑与酚和烯醇衍生物的C-H芳基化和烯基化反应被描述了。
A General Method for Copper-Catalyzed Arylation of Arene C−H Bonds
作者:Hien-Quang Do、Rana M. Kashif Khan、Olafs Daugulis
DOI:10.1021/ja805688p
日期:2008.11.12
A generalmethod for copper-catalyzedarylation of sp (2) C-Hbonds with p K a's below 35 has been developed. The method employs aryl halide as the coupling partner, lithium alkoxide or K 3PO 4 base, and DMF, DMPU, or mixed DMF/xylenes solvent. A variety of electron-rich and electron-poor heterocycles such as azoles, caffeine, thiophenes, benzofuran, pyridine oxides, pyridazine, and pyrimidine can
General Method for Functionalized Polyaryl Synthesis via Aryne Intermediates
作者:Thanh Truong、Milad Mesgar、Ky Khac Anh Le、Olafs Daugulis
DOI:10.1021/ja504886x
日期:2014.6.18
complements transition-metal-catalyzed direct arylation and allows access to structures that are not easily accessible via other direct arylation methods. The reactions are highly functional-group tolerant, with alkene, ether, dimethylamino, trifluoromethyl, ester, cyano, halide, hydroxyl, and silyl functionalities compatible with reaction conditions.
The present invention is a one-step method for efficiently converting carbon-hydrogen bonds into carbon-carbon bonds using a combination of aryl halides, a substrate, and a copper salt as catalyst. This method allows faster introduction of complex molecular entities, a process that would otherwise require many more steps. This invention is particularly relevant for the organic synthesis of complex molecules such as, but not limited to, pharmacophores and explosives.
Copper-Catalyzed Arylation of Heterocycle C−H Bonds
作者:Hien-Quang Do、Olafs Daugulis
DOI:10.1021/ja075802+
日期:2007.10.1
A new method for the direct, copper-catalyzedarylation of heterocycle C−H bonds by aryl halides has been developed. In addition to electron-rich five-membered heterocycles, electron-poor pyridine oxides can also be arylated. The best results are obtained by using a combination of lithium tert-butoxide base, aryl iodide coupling partner, and copper iodide catalyst.