Ruthenium-catalyzed Suzuki coupling of anilines with alkenyl borates via selective aryl C N bond cleavage
摘要:
Herein, we developed a new ruthenium(0)-catalyzed Suzuki-coupling of N,N-dimethyl-2-(pyridin-2-yl) anilines with alkenyl borates to synthesize 2-phenylolefins via the cleavage of neutral aryl C-N bond. In the absence of ligand and additives, by using pyridine as the directing group, the desired 2-phenylolefins were obtained in good to excellent yields with high stereoselectivity (E/Z > 20:1).
Arene‐Free Ruthenium(II/IV)‐Catalyzed Bifurcated Arylation for Oxidative C−H/C−H Functionalizations
作者:Torben Rogge、Lutz Ackermann
DOI:10.1002/anie.201909457
日期:2019.10.28
detailed insight into the selectivity- and reactivity-controlling factors in bifurcated ruthenium-catalyzed direct C-Harylations and dehydrogenative C-H/C-Hfunctionalizations. Thorough investigations revealed the importance of arene-ligand-free complexes for the formation of biscyclometalated intermediates within a ruthenium(II/IV/II) mechanistic manifold.
实验和计算研究提供了对叉化钌催化的直接CH芳基化和脱氢CH / CH功能化中选择性和反应性控制因素的详细了解。彻底的研究表明,不含芳烃配体的络合物对于在钌(II / IV / II)机械歧管中形成双环金属化中间体的重要性。
METHOD FOR PRODUCING BIARYL COMPOUND
申请人:Sato Koichi
公开号:US20100087680A1
公开(公告)日:2010-04-08
A method for producing a biaryl compound, comprising reacting an aromatic organic compound with at least one compound selected from the group consisting of aromatic organoboron compounds and boroxine compounds, in the presence of a zero-valent nickel catalyst, phosphine ligand and base.
A method for producing a biaryl compound, comprising reacting an aromatic organic compound with at least one compound selected from the group consisting of aromatic organoboron compounds and boroxine compounds, in the presence of a zero-valent nickel catalyst, phosphine ligand and base.
Herein, we report the first ruthenium-catalyzed Suzuki-type carbonylative reaction of electronically neutral anilines via C(aryl)-N bond cleavage. Without any ligand and base, diaryl ketones can be obtained in moderate to high yields by using Ru-3(CO)(12) as the catalyst and chelation assisted by pyridine. The pyridine ring has a significant effect on both high efficiency and high regioselectivity in the cleavage of the aryl C-N bond in anilines.