The first total synthesis of tanzawaic acid A(GS-1302-3) is described. The stereocontrolled synthetic route allowes the absolute stereochemistry to be determined. One key transformation in the sequence involves a Stille coupling with a highly hindered aryl triflate. Examples and results of several coupling reactions are also included.
This invention provides a therapeutic agent for hepatitis C comprising, as an active ingredient, a compound having anti-HCV activity useful in treatment of hepatitis C. The therapeutic agent for hepatitis C comprises, as an active ingredient, a compound represented by formula (I) or a pharmaceutically acceptable salt thereof.
A Pd/norbornene/Cu cooperative catalysis for the efficientsynthesis of 2-(arylthio)aryl ketones from aryl halides and thioesters has been developed. The first example of cooperative catalysis by palladium, norbornene, and copper, wherein the C(O)-S bond of thioesters is cleaved by a Pd(II) palladacycle with the assistance of CuI, has been observed.
已经开发了一种用于从芳基卤化物和硫酯有效合成 2-(芳硫基)芳基酮的 Pd/降冰片烯/Cu 协同催化。已经观察到钯、降冰片烯和铜协同催化的第一个例子,其中硫酯的 C(O)-S 键在 CuI 的帮助下被 Pd(II) 钯环裂解。
Pd-catalyzed cross-electrophile Coupling/C–H alkylation reaction enabled by a mediator generated <i>via</i> C(sp<sup>3</sup>)–H activation
作者:Zhuo Wu、Hang Jiang、Yanghui Zhang
DOI:10.1039/d1sc01731d
日期:——
Transition-metal-catalyzed cross-electrophile C(sp2)–(sp3) coupling and C–H alkylation reactions represent two efficient methods for the incorporation of an alkyl group into aromatic rings. Herein, we report a Pd-catalyzed cascade cross-electrophile coupling and C–H alkylation reaction of 2-iodo-alkoxylarenes with alkylchlorides. Methoxy and benzyloxy groups, which are ubiquitous functional groups