We have developed a mild and efficient protocol for the ligand-free and heterogeneous Pd/C-catalyzed hetero SuzukiâMiyaura coupling reaction that allows for the synthesis of both heteroarylâaryl and heteroarylâheteroaryl derivatives in good to excellent yields.
[EN] NOVEL PRECATALYST SCAFFOLDS FOR CROSS-COUPLING REACTIONS, AND METHODS OF MAKING AND USING SAME<br/>[FR] NOUVEAUX SUPPORTS DE PRÉ-CATALYSEURS POUR RÉACTIONS À COUPLAGE MUTUEL, ET LEURS PROCÉDÉS DE FABRICATION ET D'UTILISATION
申请人:UNIV YALE
公开号:WO2016057600A1
公开(公告)日:2016-04-14
The present invention provides novel transition-metal precatalysts that are useful in preparing active coupling catalysts. In certain embodiments, the precatalysts of the invention are air-stable and moisture-stable. The present invention further provides methods of making and using the precatalysts of the invention.
Novel 2-Heteroaryl Substituted Benzothiophenes and Benzofuranes 709
申请人:Arzel Erwan
公开号:US20080221149A1
公开(公告)日:2008-09-11
The present invention relates to novel 2-heteroaryl substituted benzothiophene and benzofuran derivatives, precursors thereof, and therapeutic uses of such compounds, having the structural formula (Ia) below:
and to their pharmaceutically acceptable salt, compositions and methods of use. Furthermore, the invention relates to novel 2-heteroaryl substituted benzothiophene and benzofuran derivatives that are suitable for imaging amyloid deposits in living patients, their compositions, methods of use and processes to make such compounds. More specifically, the present invention relates to a method of imaging amyloid deposits in brain in vivo to allow antemortem diagnosis of Alzheimer's disease as well as measureing clinical efficacy of Alzheimer's disease therapeutic agents.
<i>N</i>,<i>C</i>-Disubstituted Biarylpalladacycles as Precatalysts for ppm Pd-Catalyzed Cross Couplings in Water under Mild Conditions
作者:Ruchita R. Thakore、Balaram S. Takale、Fabrice Gallou、John Reilly、Bruce H. Lipshutz
DOI:10.1021/acscatal.9b04204
日期:2019.12.6
effective palladacycle precatalyst has been identified as that containing an isopropyl group on both an aryl ring and on nitrogen, together with the ligand EvanPhos and triflate as the counterion (P13). This precatalyst is also effective in other C–C bond-forming reactions, such as Heck and Sonogashira couplings. No organic solvents were needed for these processes, while the aqueous reaction medium could be
Slow Release of Organoboronic Acids in Cross-Coupling Reactions
申请人:Burke Martin D.
公开号:US20100121062A1
公开(公告)日:2010-05-13
A method of performing a chemical reaction includes reacting a compound selected from the group consisting of an organohalide and an organo-pseudohalide, and a protected organoboronic acid represented by formula (I) in a reaction mixture:
R
1
—B-T (I);
where R
1
represents an organic group, T represents a conformationally rigid protecting group, and B represents boron having sp
3
hybridization. When unprotected, the corresponding organoboronic acid is unstable by the boronic acid neat stability test. The reaction mixture further includes a base having a pK
B
of at least 1 and a palladium catalyst. The method further includes forming a cross-coupled product in the reaction mixture.