Synthesis of Aryl Sulfonamides via Palladium-Catalyzed Chlorosulfonylation of Arylboronic Acids
作者:J. Robb DeBergh、Nootaree Niljianskul、Stephen L. Buchwald
DOI:10.1021/ja405949a
日期:2013.7.24
A palladium-catalyzed method for the preparation of sulfonamides is described. The process exhibits significant functional group tolerance and allows for the preparation of a number of arylsulfonyl chlorides and sulfonamides under mild conditions.
Design of New Ligands for the Palladium-Catalyzed Arylation of α-Branched Secondary Amines
作者:Nathaniel H. Park、Ekaterina V. Vinogradova、David S. Surry、Stephen L. Buchwald
DOI:10.1002/anie.201502626
日期:2015.7.6
reactions, α‐branched secondaryamines are difficult coupling partners and the desired products are often produced in low yields. In order to provide a robust method for accessing N‐aryl α‐branched tertiary amines, new catalysts have been designed to suppress undesired side reactions often encountered when these amine nucleophiles are used. These advances enabled the arylation of a wide array of sterically
Rational Ligand Design for the Arylation of Hindered Primary Amines Guided by Reaction Progress Kinetic Analysis
作者:Paula Ruiz-Castillo、Donna G. Blackmond、Stephen L. Buchwald
DOI:10.1021/ja512903g
日期:2015.3.4
We report the Pd-catalyzed arylation of very hindered α,α,α-trisubstituted primary amines. Kinetics-based mechanistic analysis and rational design have led to the development of two biarylphosphine ligands that allow the transformation to proceed with excellent efficiency. The process was effective in coupling a wide range of functionalized aryl and heteroaryl halides under mild conditions.
Highly Selective Palladium-Catalyzed Cross-Coupling of Secondary Alkylzinc Reagents with Heteroaryl Halides
作者:Yang Yang、Katrin Niedermann、Chong Han、Stephen L. Buchwald
DOI:10.1021/ol502230p
日期:2014.9.5
The highly selective palladium-catalyzed Negishi coupling of secondary alkylzinc reagents with heteroarylhalides is described. The development of a series of biarylphosphine ligands has led to the identification of an improved catalyst for the coupling of electron-deficient heterocyclic substrates. Preparation and characterization of oxidative addition complex (L)(Ar)PdBr provided insight into the
描述了仲烷基锌试剂与杂芳基卤化物的高选择性钯催化 Negishi 偶联。一系列联芳基膦配体的开发导致鉴定出一种用于缺电子杂环底物偶联的改进催化剂。氧化加成配合物 ( L )(Ar)PdBr 的制备和表征提供了洞察基于 CPhos 型配体的催化剂在促进具有挑战性的还原消除过程中的独特反应性。
PHOSPHINE LIGANDS FOR CATALYTIC REACTIONS
申请人:AbbVie Inc.
公开号:US20150152126A1
公开(公告)日:2015-06-04
The disclosure is directed to: (a) phosphacycle ligands; (b) catalyst compositions comprising phosphacycle ligands; and (c) methods of using such phosphacycle ligands and catalyst compositions in bond forming reactions.