A P,N-Ligand for Palladium-Catalyzed Ammonia Arylation: Coupling of Deactivated Aryl Chlorides, Chemoselective Arylations, and Room Temperature Reactions
作者:Rylan J. Lundgren、Brendan D. Peters、Pamela G. Alsabeh、Mark Stradiotto
DOI:10.1002/anie.201000526
日期:2010.6.1
Amazing ammonia: A new air‐stable P,N‐ligand (Mor‐DalPhos) is reported that enables the palladium‐catalyzed cross‐coupling of ammonia to a variety of aryl chloride and aryl tosylate substrates with high chemoselectivity and, for the first time, at room temperature (see scheme; Ad=adamantyl, Ts=para‐toluenesulfonyl).
惊人的氨气:据报道,一种新型的空气稳定的P,N-配体(Mor-DalPhos)使钯催化的氨气与多种具有高化学选择性的芳基氯和甲苯磺酸芳基酯的交叉偶联成为首次。 ,在室温下(参见方案; Ad =金刚烷基,Ts =对甲苯磺酰基)。
Highly Active Palladium Catalysts for Suzuki Coupling Reactions
作者:John P. Wolfe、Robert A. Singer、Bryant H. Yang、Stephen L. Buchwald
DOI:10.1021/ja992130h
日期:1999.10.1
room-temperature Suzukicoupling of aryl bromides and aryl chlorides with 0.5−1.0 mol % Pd. Use of o-(dicyclohexylphosphino)biphenyl (2) allows Suzukicouplings to be carried out at low catalyst loadings (0.000001−0.02 mol % Pd). The process tolerates a broad range of functional groups and substrate combinations including the use of sterically hindered substrates. This is the most activecatalyst system in
Reductive Cross-Coupling of Aldehydes and Imines Mediated by Visible Light Photoredox Catalysis
作者:Rui Wang、Mengyue Ma、Xu Gong、Xinyuan Fan、Patrick J. Walsh
DOI:10.1021/acs.orglett.8b03394
日期:2019.1.4
As a result, chemoselective cross-electrophile couplings between aldehydes and ketimines are achieved via umpolung reactivity of ketimines to furnish amino alcohols (44 examples with good to excellent yields). To illustrate the utility of the amino alcohol products, 1,2-dihydroindol-3-one-based fluorophores are easily synthesized using the coupling products. Finally, a plausible reaction pathway is
Process for the preparation of aminoaryl- and aminoheteroaryl boronic acids and esters
申请人:Euticals S.P.A.
公开号:EP2801577A1
公开(公告)日:2014-11-12
The present invention relates to a process for the preparation of aminoaryl- and aminoheteroaryl boronic acids and esters of formula (I) in high yields
The claimed process uses diarylketal formula (V) to generate an arylbromid of formula (III) in which the amino-group is protected as bisarylmethylidenimino-group:
Preparation of Aminoaryl and Aminoheteroaryl Boronic Acids and Derivatives Thereof
申请人:Kressierer Christoph J.
公开号:US20080269523A1
公开(公告)日:2008-10-30
The invention relates to a method for preparation of aminoaryl- or aminoheteroarylboronic acids and esters and salts thereof in which an optionally substituted aminoaryl or aminoheteroaryl compound is protected at its nitrogen site via condensation with a carbonyl compound, subsequently metalated and converted with a suitable boron compound. Depending on the subsequent work-up and removal of the protective group, the corresponding boronic acid, the anhydride or the boronic acid ester thereof is obtained