Remote site-selective C–H activation directed by a catalytic bifunctional template
作者:Zhipeng Zhang、Keita Tanaka、Jin-Quan Yu
DOI:10.1038/nature21418
日期:2017.3
In chemical syntheses, the activation of carbon–hydrogen (C–H) bonds converts them directly into carbon–carbon or carbon–heteroatom bonds without requiring any prior functionalization. C–Hactivation can thus substantially reduce the number of steps involved in a synthesis. A single specific C–H bond in a substrate can be activated by using a ‘directing’ (usually a functional) group to obtain the desired
作者:Andrey Borzenko、Nicolas L. Rotta-Loria、Preston M. MacQueen、Christopher M. Lavoie、Robert McDonald、Mark Stradiotto
DOI:10.1002/anie.201410875
日期:2015.3.16
diverse (hetero)aryl chloride, bromide, and tosylate electrophiles were employed in the Ni‐catalyzed monoarylation of ammonia, including chemoselective transformations. The employed JosiPhos/[Ni(cod)2] catalyst system enables the use of commercially available stock solutions of ammonia, or the use of ammonia gas in these reactions, thereby demonstrating the versatility and potential scalability of the reported
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)。
Nickel-Catalyzed Amination of Aryl Chlorides with Amides
作者:Jinpeng Li、Changyu Huang、Daheng Wen、Qingshu Zheng、Bo Tu、Tao Tu
DOI:10.1021/acs.orglett.0c03836
日期:2021.2.5
nickel-catalyzed amination of aryl chlorides with diverse amides via C–N bond cleavage has been realized under mild conditions. A broad substrate scope with excellent functional group tolerance at a low catalyst loading makes the protocol powerful for synthesizing various aromatic amines. The aryl chlorides could selectively couple to the amino fragments rather than the carbonyl moieties of amides. Our protocol
[EN] HIGHLY ACTIVE METATHESIS CATALYSTS SELECTIVE FOR ROMP AND RCM REACTIONS<br/>[FR] CATALYSEURS DE MÉTATHÈSE D'ACTIVITÉ ÉLEVÉE SÉLECTIFS VIS-À-VIS DES RÉACTIONS DE ROMP ET DE RCM
申请人:ZANNAN SCITECH CO LTD
公开号:WO2011079439A1
公开(公告)日:2011-07-07
The present invention relates to a kind of novel carbene ligands and corresponding new ruthenium catalysts, which are highly active and selective for ROMP and RCM reactions. It discloses the significant electronic effect of different substituted carbene ligands on the catalytic activity and stability of corresponding carbene ruthenium complexes; some of novel ruthenium complexes in the invention can be broadly used as catalysts highly effectively and selective for ROMP and RCM reactions. The invention also relates to preparation of new ruthenium complexes and the use in metathesis. Moreover, the invention also provides efficient methods of making various functional polymers by ROMP reaction in the presence of the new ruthenium catalysts.