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.
A Facile Route to<i>Ortho</i>-Hydroxyanilnes through an Ir<sup>III</sup>-Catalyzed Direct C−H Amidation of 2-Phenoxypyridines
作者:Lianhui Wang、Zi Yang、Mengqi Yang、Miaodou Tian、Changsheng Kuai、Xiuling Cui
DOI:10.1002/asia.201701028
日期:2017.10.5
A highly efficient and regioselective IrIII‐catalyzed C−H amidation of 2‐phenoxypyridines has been developed by using sulfonyl azides as an amino source. The amidated products were provided in good‐to‐excellent yields with broad functional‐group tolerance. Furthermore, the 2‐pyridyl moiety in the amidated products could be readily removed, thus offering an efficient route to synthetically useful ortho‐hydroxyanilnes
An efficient palladium‐catalyzed decarboxylative ortho‐acylation of 2‐aryloxypyridines with α‐oxocarboxylicacids is described. In this new transformation, the aromatic C(sp2)H bond was successfully acylated to give diverse aromatic ketones regioselectively in moderate to good yields. The pyridine group can be removed easily after the acylation to give the corresponding 2‐hydroxy aromatic ketones
Ruthenium-Catalyzed <i>ortho</i>/<i>meta</i>-Selective Dual C–H Bonds Functionalizations of Arenes
作者:Gang Li、Biao Zhu、Xingxing Ma、Chunqi Jia、Xulu Lv、Junjie Wang、Feng Zhao、Yunhe Lv、Suling Yang
DOI:10.1021/acs.orglett.7b02439
日期:2017.10.6
The first example of transition-metal-catalyzed ortho/meta-selective dual C–H functionalizations of arenes in one reaction is described. In this transformation, ortho-C–H chlorination and meta-C–H sulfonation of 2-phenoxypyri(mi)dines were achieved simultaneously under catalysis by [Ru(p-cymene)Cl2]2. The other reactant, namely, an arylsulfonyl chloride, played the role of both a sulfonation and chlorination