Rh<sup>III</sup>-Catalyzed Olefination of 2-Aryloxypyridines Using 2-Pyridyloxyl as the Removable Directing Group
作者:Arun Jyoti Borah、Guobing Yan、Lianggui Wang
DOI:10.1002/ejoc.201500530
日期:2015.7
An efficient RhIII-catalyzed trans selective ortho-olefination of 2-aryloxypyridines has been developed. The catalytic system is very effective for olefination of differently substituted 2-aryloxypyridines with acrylates, acrylamide and styrenes and exhibits broad compatibility with assorted olefinic coupling partners. Although acrylates and acrylamide give rise to trans-olefinated products in MeOH
Ruthenaelectro-catalyzed C–H acyloxylation for late-stage tyrosine and oligopeptide diversification
作者:Xiaoyan Hou、Nikolaos Kaplaneris、Binbin Yuan、Johanna Frey、Tsuyoshi Ohyama、Antonis M. Messinis、Lutz Ackermann
DOI:10.1039/d1sc07267f
日期:——
Ruthenaelectro(II/IV)-catalyzed intermolecular C–H acyloxylations of phenols have been developed by guidance of experimental, CV and computational insights. The use of electricity bypassed the need for stoichiometric chemical oxidants. The sustainable electrocatalysis strategy was characterized by ample scope, and its unique robustness enabled the late-stage C–H diversification of tyrosine-derived
在实验、CV 和计算见解的指导下,开发了钌电 ( II / IV ) 催化的酚分子间 C–H 酰氧基化反应。电力的使用绕过了对化学计量化学氧化剂的需求。可持续电催化策略的特点是范围广泛,其独特的鲁棒性使得酪氨酸衍生肽的后期C-H多样化成为可能。
Ruthenium(II)-Catalyzed CH Alkenylations of Phenols with Removable Directing Groups
作者:Wenbo Ma、Lutz Ackermann
DOI:10.1002/chem.201301988
日期:2013.10.4
Cationic ruthenium(II) complexes enabled oxidativealkenylations of phenols bearing easily cleavable directing groups. The optimized catalytic system allowed twofold CH bond activations with excellent chemo‐, site‐, and diastereoselectivities. The double CH functionalization process proceeded efficiently in an aerobic fashion under an atmosphere of ambient air. Detailed mechanistic studies were performed