Palladium-Catalyzed Zinc-Amide-Mediated CH Arylation of Fluoroarenes and Heteroarenes with Aryl Sulfides
作者:Shinya Otsuka、Hideki Yorimitsu、Atsuhiro Osuka
DOI:10.1002/chem.201502101
日期:2015.10.12
heteroarenes with aryl sulfides proceeds smoothly with the aid of a palladium–N‐heterocyclic carbene catalyst. A bulky zinc amide, TMPZnCl⋅LiCl, plays a key role as an effective base to generate the corresponding arylzinc species in situ. This arylation protocol is practically much easier to perform than our previous method, which necessitates preparation of the arylzincreagents in advance from the corresponding
Ç polyfluoroarenes和杂芳烃的与芳基硫化物ħ芳基化用钯- N-杂环卡宾催化剂的帮助下顺利进行。甲笨重锌酰胺,TMPZnCl ⋅的LiCl,起着以原位产生相应的芳基锌物种的有效碱关键作用。该芳基化方案实际上比我们以前的方法更容易执行,后者需要从相应的芳基卤化物预先制备芳基锌试剂。通过硫特异性反应(如S N Ar磺酰化反应和扩展的Pummerer反应)制备的芳基硫化物会经历这种直接芳基化,从而提供有趣的转化,而这些转化是传统的基于卤素的有机合成难以实现的。
Copper-Catalyzed Electrophilic Amination of Heteroarenes and Arenes by CH Zincation
作者:Stacey L. McDonald、Charles E. Hendrick、Qiu Wang
DOI:10.1002/anie.201311029
日期:2014.4.25
Direct amination of heteroarenes and arenes has been achieved in a one‐pot CH zincation/copper‐catalyzed electrophilic amination procedure. This amination method provides an efficient and rapid approach to access a diverse range of heteroaromatic and aromatic amines including those previously inaccessible using CH amination methods. The mild reaction conditions and good functional‐group compatibility
杂芳烃和芳烃的直接胺化已经在一锅C - H锌化/铜催化的亲电胺化过程中实现。这种胺化方法提供了一种高效、快速的方法来获得各种杂芳胺和芳香胺,包括以前使用 C - H 胺化方法无法获得的胺。温和的反应条件和良好的官能团相容性证明了其在合成重要且复杂的胺类方面的巨大潜力。
Direct arylation of heterocycles through C–H bond cleavage using metal–organic-framework Cu<sub>2</sub>(OBA)<sub>2</sub>(BPY) as an efficient heterogeneous catalyst
作者:Thanh Truong、Vu T. Nguyen、Hue T. X. Le、Nam T. S. Phan
DOI:10.1039/c4ra09092f
日期:——
Cu2(OBA)2(BPY) was showed to be an efficient heterogeneous catalyst for direct C-arylation of a variety of heterocycles by iodoarenes. The optimal conditions employed tBuOLi in dioxane at elevated temperature.
An efficient approach using a photocatalytic strategy for C−Hperfluoroalkylation of quinoxalinonesunderaerobicoxidationcondition has been developed. Such transformation employs readily available sodium perfluoroalkanesulfinates as perfluoroalkylation reagents and demonstrates good functional group compatibility, affording corresponding products in moderate to good yields. Compared with previous
[EN] METHOD FOR PREPARATION OF ALKYLATED OR FLUORO, CHLORO AND FLUOROCHLORO ALKYLATED COMPOUNDS BY HETEROGENEOUS CATALYSIS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS ALKYLÉS OU FLUORO, CHLORO ET FLUOROCHLORO ALKYLÉS PAR CATALYSE HÉTÉROGÈNE
申请人:LONZA AG
公开号:WO2015185677A1
公开(公告)日:2015-12-10
The invention discloses a method for preparation of alkylated or fluoro, chloro and fluorochloro alkylated compounds by a heterogeneous Pt/C-catalyzed alkylation or fluoro, chloro and fluorochloro alkylation with alkyl halides or with fluoro, chloro and fluorochloro alkyl halides in the presence of Cs2C03 or CsHC03.