Easily Accessible and Highly Tunable Indolyl Phosphine Ligands for Suzuki−Miyaura Coupling of Aryl Chlorides
摘要:
This study describes a new class of easily accessible indolyl phosphine ligands, prepared via an efficient protocol involving Fischer indolization from readily available phenylhydrazine and substituted acetophenones. This versatile ligand scaffold provides beneficial features, including high potential of steric and electronic tunability. The air-stable indolyl phosphines in combination with a palladium metal precursor provide highly effective catalysts for Suzuki-Miyaura coupling of unactivated aryl chlorides, and the catalyst loading down to 0.02 mol % can be achieved.
Palladium-Catalyzed Direct Intermolecular α-Arylation of Amides with Aryl Chlorides
作者:Bing Zheng、Tiezheng Jia、Patrick J. Walsh
DOI:10.1021/ol4019002
日期:2013.8.16
An efficient catalytic system for the direct intermolecularα-arylation of acetamide derivatives with aryl chlorides is presented. Chemoselectivities up to 10:1 in the mono- and diarylation of acetamides were achieved by careful selection of bases, solvents, and stoichiometry. Bis-arylated amides were prepared in up to 95% yield.
Methods of preparing substituted bicyclo[0.1.1.1]pentane compounds of Formula (I) comprise reacting a compound of Formula (A) with a compound of Formula (B) in the presence of a first transition metal catalyst selected from a palladium catalyst and a nickel catalyst, where the variables R1, R2, X1 and X2 are as described herein.
[EN] METHODS FOR CROSS COUPLING<br/>[FR] PROCÉDÉS DE COUPLAGE CROISÉ
申请人:KALYRA PHARMACEUTICALS INC
公开号:WO2018039232A1
公开(公告)日:2018-03-01
Methods of preparing substituted bicyclo[1.1.1]pentane compounds of Formula (I) comprise reacting a compound of Formula (A) with a compound of Formula (B) in the presence of a first transition metal catalyst selected from a palladium catalyst and a nickel catalyst, where the variables R1, R2, X1 and X2 are as described herein.
A General and Practical Palladium-Catalyzed Direct α-Arylation of Amides with Aryl Halides
作者:Bing Zheng、Tiezheng Jia、Patrick J. Walsh
DOI:10.1002/adsc.201300851
日期:2014.1.13
An efficient system for the direct catalytic intermolecular α‐arylation of acetamide derivatives with aryl bromides and chlorides is presented. The palladium catalyst is supported by Kwong’s indole‐based phosphine ligand and provides monoarylated amides in up to 95% yield. Excellent chemoselectivities (>10:1) in the mono‐ and diarylation with aryl bromides were achieved by careful selection of bases