Negishi cross-coupling reaction catalyzed by an aliphatic, phosphine based pincer complex of palladium. biaryl formation via cationic pincer-type PdIV intermediates
作者:Roman Gerber、Olivier Blacque、Christian M. Frech
DOI:10.1039/c1dt10398a
日期:——
The aliphatic, phosphine-based pincercomplex [(C10H13-1,3-(CH2P(Cy2)2)Pd(Cl)] (1) is a highlyactiveNegishicatalyst, enable to quantitatively couple various electronically activated, non-activated, deactivated, sterically hindered and functionalized aryl bromides with various diarylzinc reagents within short reaction times and low catalyst loadings. Experimental observations strongly indicate that
Picosecond Laser Spectroscopy of Intramolecular Heteroexcimer Systems. Time-resolved Fluorescence Studies of<i>p</i>-(CH<sub>3</sub>)<sub>2</sub>NC<sub>6</sub>H<sub>4</sub>–(CH<sub>2</sub>)<i><sub>n</sub></i>–(9-Anthryl),<i>p</i>-(CH<sub>3</sub>)<sub>2</sub>NC<sub>6</sub>H<sub>4</sub>–(1-Pyrenyl) Systems and 9,9′-Bianthryl
9′-bianthryl. Effects of methylene chain length, solvent polarity and viscosityupon the intramolecular charge transfer processes have been clearly demonstrated. It is concluded that molecules with sandwich configuration in the ground state are not recognized in both n=3 compounds, and it takes a few ns for the heteroexcimer formation in hexane because of an extensive conformationchange necessary to
We report the synthesis and characterization of meso-anthracenylporphyrins with zinc and nickel metal centers. A variety of novel aryl and alkyl meso-substituted anthracenylporphyrins were synthesized via step-wise Suzuki cross-coupling reactions using anthracenyl boronates. This method was compared to standard syntheses based on condensation reactions to yield anthracenylporphyrins of the A2B2- and
我们报告了具有锌和镍金属中心的中间蒽基卟啉的合成和表征。使用蒽基硼酸酯通过逐步 Suzuki 交叉偶联反应合成了多种新型芳基和烷基内消旋取代的蒽基卟啉。将该方法与基于缩合反应的标准合成方法进行比较,以产生 A 的蒽基卟啉2乙2- 和一个3B型。通过 Suzuki 偶联合成许多功能化的蒽衍生物对该工作进行了补充。对选定的系统进行单晶 X 射线分析,结果显示镍 (II) 蒽基卟啉具有不寻常的紧密堆积。
Back matter
作者:Gerber, Roman、Blacque, Olivier、Frech, Christian M.
DOI:10.1039/c1dt90189c
日期:——
Barnett; Cook; Matthews, Recueil des Travaux Chimiques des Pays-Bas, 1925, vol. 44, p. 217,219