Palladium-Catalyzed Carbonylation of Aryl Tosylates and Mesylates
作者:Rachel H. Munday、Joseph R. Martinelli、Stephen L. Buchwald
DOI:10.1021/ja711449e
日期:2008.3.1
A general protocol for the palladium-catalyzed carbonylation of aryl tosylates and mesylates to form esters has been developed using a catalyst system derived from Pd(OAc)2 and the bulky, bidentate dcpp ligand. The system operates under mild conditions: atmospheric CO pressure and temperatures of 80-110 degrees C. A broad substrate scope has been demonstrated allowing carbonylation of electron-rich
已经使用衍生自 Pd(OAc)2 和庞大的双齿 dcpp 配体的催化剂系统开发了钯催化的甲苯磺酸芳基酯和甲磺酸酯羰基化形成酯的通用方案。该系统在温和的条件下运行:大气 CO 压力和 80-110 摄氏度的温度。 广泛的底物范围已被证明允许富电子、缺电子和杂环甲苯磺酸酯和甲磺酸酯羰基化,反应显示出广泛的官能团宽容。
Green Approach for Visible-Light-Induced Direct Functionalization of 2-Methylquinolines
作者:Juliana A. Dantas、Radell Echemendía、Marilia S. Santos、Márcio W. Paixão、Marco Antonio B. Ferreira、Arlene G. Corrêa
DOI:10.1021/acs.joc.0c01203
日期:2020.9.18
metal- and oxidant-free visible light-photoinduced protocol for directfunctionalization of 2-methylquinolines has been developed. This protocol enabled the C–H functionalization of substituted 2-methylquinolines with diacetyl or ethyl pyruvate, under environmentally friendly conditions. A mechanistic investigation based on density functional theory (DFT) calculations provided details about the origins
Heterogeneous Catalysis with Nickel-on-Graphite (Ni/Cg): Reduction of Aryl Tosylates and Mesylates
作者:Bruce H. Lipshutz、Bryan A. Frieman、Tom Butler、Vladimir Kogan
DOI:10.1002/anie.200502887
日期:2006.1.23
A Versatile Catalyst System for Suzuki−Miyaura Cross-Coupling Reactions of C(sp<sup>2</sup>)-Tosylates and Mesylates
作者:Brijesh Bhayana、Brett P. Fors、Stephen L. Buchwald
DOI:10.1021/ol9015892
日期:2009.9.3
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.
Aminocarbonylation of Aryl Tosylates to Carboxamides
作者:Seungwon Chung、Neal Sach、Chulho Choi、Xiaojing Yang、Susan E. Drozda、Robert A. Singer、Stephen W. Wright
DOI:10.1021/acs.orglett.5b01283
日期:2015.6.5
The palladium - catalyzed aminocarbonylation of aryl tosylates with amines is reported. Suitable conditions were identified by high throughput reaction screening and then further optimized. The substrate scope of the reaction with respect to the aryl tosylate component and the amine component are reported. Competitive aminolysis of the aryl tosylates to afford the amine toluenesulfonamides and the phenol was not observed.