Pd-catalyzed oxidative acylation of 2-phenoxypyridines with alcohols via C–H bond activation
作者:Minyoung Kim、Satyasheel Sharma、Jihye Park、Mirim Kim、Yeonhee Choi、Yukyoung Jeon、Jong Hwan Kwak、In Su Kim
DOI:10.1016/j.tet.2013.06.008
日期:2013.8
A palladium-catalyzedoxidativeacylation of 2-phenoxypyridines with benzylic and aliphatic alcohols via C–H bondactivation is described. This protocol represents direct access to biologically active ortho-acylphenol derivatives, and provides new opportunities to use readily available alcohols as starting materials for catalytic acylation reactions.
Because diarylethers are present as an important motif in pharmaceuticals and natural products, extensive studies for the development of novel methods have been conducted. A conventional method for the construction of the diarylether moiety is the intermolecular cross-coupling reaction of aryl halides and phenols with a copper or palladium catalyst. We developed a catalytic decarbonylative etherification
Synthesis of <i>m</i>-Alkylphenols via a Ruthenium-Catalyzed C–H Bond Functionalization of Phenol Derivatives
作者:Gang Li、Panpan Gao、Xulu Lv、Chen Qu、Qingkai Yan、Ya Wang、Suling Yang、Junjie Wang
DOI:10.1021/acs.orglett.7b00885
日期:2017.5.19
The first example of the synthesis of m-alkylphenols via a ruthenium-catalyzed CAr–H bond functionalization of phenolderivatives with sec/tert-alkyl bromides is reported. Mechanistic studies indicated that the m-CAr–H bond alkylation may involve a radical process and that a six-membered ruthenacycle complex was the active catalyst. Moreover, this approach can provide an expedited strategy for the
合成的第一个例子米烷基酚经由钌催化Ç氩苯酚衍生物与-H键官能/叔秒报道烷基溴化物。机理研究表明,m -C Ar -H键烷基化可能涉及自由基过程,六元钌环络合物是活性催化剂。而且,这种方法可以为许多值得注意的药物和其他功能分子的原子/步经济合成提供快速的策略。
Rhodium-catalyzed <i>ortho</i>-heteroarylation of phenols: directing group-enabled switching of the electronic bias for heteroaromatic coupling partner
作者:Yimin Wu、Wei Li、Linfeng Jiang、Luoqiang Zhang、Jingbo Lan、Jingsong You
DOI:10.1039/c8sc02529k
日期:——
The directedoxidative C–H/C–H cross-coupling reactions between a functionalized arene and a heteroarene typically exhibit an electronic bias for the heteroaromatic coupling partner. Disclosed herein is a conception of directing group enabled-switching of the electronic bias for coupling partner from the electron-deficient to electron-rich heteroarene, demonstrating that the modification of the directing
The nickel‐catalyzed borylation of aryl2‐pyridyl ethers via the loss of a 2‐pyridyloxy group is described. This method allows a 2‐pyridyloxy group to be used as a convertible directing group in C−H bond functionalization reactions. The nickel catalyst can also borylate arylmethyl 2‐pyridyl ethers, in which the stereochemistry at the benzylic position is retained in the case of chiral secondary benzylic