Room-Temperature Suzuki-Miyaura Coupling of Heteroaryl Chlorides and Tosylates
作者:Junfeng Yang、Sijia Liu、Jian-Feng Zheng、Jianrong Steve Zhou
DOI:10.1002/ejoc.201200918
日期:2012.11
Suzuki–Miyauracoupling of heteroaryls is an important method for the preparation of compound libraries for medicinal chemistry and materials research. Although many catalysts have been developed, none of them have been generally applicable to the coupling reactions of heteroarylchlorides and tosylates at room temperature. We discovered that a catalyst combination of Pd(OAc)2 and XPhos (2-dicyclohexylphosphanyl-2′
B(C<sub>6</sub>
F<sub>5</sub>
)<sub>3</sub>
-Catalyzed Cascade Reduction of Pyridines
作者:Zhi-Yun Liu、Zhi-Hui Wen、Xiao-Chen Wang
DOI:10.1002/anie.201702304
日期:2017.5.15
development hinges upon the realization of a cascade process of dearomative hydrosilylation (or hydroboration) and transfer hydrogenation. The broad functional‐group tolerance (e.g. ketone, ester, unactivated olefins, nitro, nitrile, heterocycles, etc.) implies high practical utility.
已发现B(C 6 F 5)3是一种有效的催化剂,可以用氢化硅烷(或氢硼烷)和胺作为还原剂还原吡啶和其他电子不足的N-杂芳烃。该开发的成功取决于脱芳香氢化硅烷化(或硼氢化)和转移氢化的级联过程的实现。宽泛的官能团耐受性(例如酮,酯,未活化的烯烃,硝基,腈,杂环等)暗示着很高的实用性。
Catalyst shuttling enabled by a thermoresponsive polymeric ligand: facilitating efficient cross-couplings with continuously recyclable ppm levels of palladium
作者:Erfei Wang、Mao Chen
DOI:10.1039/c9sc02171j
日期:——
A polymeric monophosphine ligand WePhos has been synthesized and complexed with palladium(II) acetate [Pd(OAc)2] to generate a thermoresponsive pre-catalyst that can shuttle between water and organic phases, with the change being regulated by temperature. The structure of the polymeric ligand was confirmed with matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry
Efficient Diphosphane-Based Catalyst for the Palladium-Catalyzed Suzuki Cross-Coupling Reaction of 3-Pyridylboronic Acids
作者:Xing-Li Fu、Lei-Lei Wu、Hai-Yan Fu、Hua Chen、Rui-Xiang Li
DOI:10.1002/ejoc.200900038
日期:2009.5
4′-bis(diphenylphosphanyl)-3,3′-bipyridine (P-Phos) has been developed for the Suzukicross-coupling reaction of pyridylboronic acid with a variety of aryl halides in good to excellent yields, even in the presence of hindered and functional groups. In addition, P-Phos also exhibited high activity in the palladium-catalyzedSuzuki reaction of 2,6-dimethoxypyridylboronic acid in excellent yields with a fast
An easily available Pd(OAc)2/(2-(anthracen-9-yl)-1H-inden-3-yl) dicyclohexylphosphine/toluene/iPrOH/water catalyticsystem was developed, which shows high catalytic activity in the Suzuki–Miyaura cross-coupling reactions of a diverse array of aryl and heteroaryl chlorides with Pd loadings down to 0.01 mol%.