A Versatile Catalyst System for Suzuki−Miyaura Cross-Coupling Reactions of C(sp2)-Tosylates and Mesylates
摘要:
A catalyst system for the Suzuki-Miyaura cross-coupling reactions of aryl and vinyl tosylates and mesylates has been developed. This catalyst displays excellent functional group tolerance and allows the coupling of heteroarylboronic acids with aryl tosylates and mesylates to be performed in high yields. Moreover, reactions employing alkylboronic acids, as well as heteroaryl, vinyl, and allylic pinacol boronate esters, were conducted with high efficiencies.
Compounds having formula (I)
inhibit cellular proliferation. Processes for the preparation of the compounds, pharmaceutical compositions containing the compounds, and methods of treatment using the compounds are disclosed.
Palladium-Catalyzed Direct Arylations of Heteroarenes with Tosylates and Mesylates
作者:Lutz Ackermann、Andreas Althammer、Sabine Fenner
DOI:10.1002/anie.200804517
日期:2009.1
A toss up: A highly active palladium complex enabled the first directarylation of heteroarenes through CH bond functionalization using tosylates or mesylates as electrophiles with ample scope.
Well-Defined Air-Stable Palladium HASPO Complexes for Efficient Kumada-Corriu Cross-Couplings of (Hetero)Aryl or Alkenyl Tosylates
作者:Lutz Ackermann、Anant R. Kapdi、Sabine Fenner、Christoph Kornhaaß、Carola Schulzke
DOI:10.1002/chem.201002386
日期:2011.3.1
Palladium complexes of representative heteroatom‐substituted secondary phosphine oxide (HASPO) preligands were synthesized and fully characterized, including X‐ray crystal structure analysis. Importantly, these well‐defined complexes served as highly efficientcatalysts for Kumada–Corriu cross‐couplingreactions of aryl, alkenyl, and even heteroaryl tosylates. Particularly, an air‐stable catalyst derived
代表的钯络合物ħ etero一汤姆取代小号econdary p hoSPhine ø西德(HASPO)preligands合成并充分表征,包括X射线晶体结构分析。重要的是,这些定义明确的络合物可作为Kumada-Corriu芳基,烯基乃至杂芳基甲苯磺酸酯交叉偶联反应的高效催化剂。特别是,由廉价的PinP(O)H衍生的空气稳定型催化剂显示出极高的催化效力,这导致在极低的反应条件下,在足够宽泛的反应条件下,低催化剂负载下的交叉偶联。
Direct arylations of electron-deficient (hetero)arenes with aryl or alkenyl tosylates and mesylates
作者:Lutz Ackermann、Sabine Fenner
DOI:10.1039/c0cc02360d
日期:——
A palladium catalyst derived from the ligand X-Phos enabled generally applicable directarylations of electron-deficient heteroarenes and arenes with aryl and alkenyl tosylates or mesylates.
作者:Stephen L. Gwaltney、Hovis M. Imade、Kenneth J. Barr、Qun Li、Laura Gehrke、R.Bruce Credo、Robert B. Warner、Jang Yun Lee、Peter Kovar、Jieyi Wang、Michael A. Nukkala、Nicolette A. Zielinski、David Frost、Shi-Chung Ng、Hing L. Sham
DOI:10.1016/s0960-894x(01)00098-1
日期:2001.4
Sulfonate analogues of combretastatin A-4 have been prepared. These compounds compete with colchicine and combretastatin A-4 for the colchicine binding site on tubulin and are potent inhibitors of tubulin polymerization and cell proliferation. Importantly, these compounds also inhibit the proliferation of P-glycoprotein positive (+) cancer cells, which are resistant to many other antitumor agents. (C) 2001 Elsevier Science Ltd. All rights reserved.