Coupling of Nitrogen Heteroaromatics and Alkanes without Transition Metals: A New Oxidative Cross-Coupling at CH/CH Bonds
作者:Guojun Deng、Kirika Ueda、Shuichi Yanagisawa、Kenichiro Itami、Chao-Jun Li
DOI:10.1002/chem.200801893
日期:2009.1.2
Look—no transition metal! Transition‐metal‐free systems for the direct cross‐coupling reactions of nitrogen heteroaromatics and alkanes are described. Under the influence of tBuOOtBu, pyridine N‐oxide derivatives react with alkanes to furnish the corresponding cross‐coupling products (alkylated nitrogen heterocycles) in good yields.
看,没有过渡金属!描述了用于氮杂芳烃和烷烃直接交叉偶联反应的无过渡金属体系。在t BuOO t Bu的影响下,吡啶N-氧化物衍生物与烷烃反应,以高收率提供相应的交叉偶联产物(烷基化氮杂环)。
Palladium-Catalyzed C–H Activation/Cross-Coupling of Pyridine <i>N</i>-Oxides with Nonactivated Secondary Alkyl Bromides
作者:Bin Xiao、Zhao-Jing Liu、Lei Liu、Yao Fu
DOI:10.1021/ja3113752
日期:2013.1.16
activation/C-C cross-coupling reaction has been found to occur between pyridine N-oxides and general nonactivated secondary and even tertiary alkylbromides. It provides a practically useful approach for the synthesis of alkylated pyridine derivatives. Experimental observations indicated that the C-Br cleavage step involves a radical-type process. Thus, the title reaction provides a rather extraordinary