An unprecedented palladium-catalyzed chemoselective reduction and reductive amination of nitroarenes with water as a hydrogen source mediated by diboronic acid have been discovered. A series of aryl amines containing various reducible functional groups were obtained in good to excellent yields.
Preparation of a novel cadmium-containing coordination polymer and catalytic application in the synthesis of <i>N</i>-alkylated aminoquinoline derivatives <i>via</i> the borrowing hydrogen approach
Herein, we report an efficient and straightforward approach for the synthesis of N-alkylated aminoquinoline derivatives by recyclable Cd-containing coordination polymer-catalyzed reactions of aminoquinolines with primary alcohols via the borrowing hydrogen strategy. In this work, a new type of coordination polymer [Cd(CIA)(phen)2(H2O)]n was successfully designed and fabricated. The molecular structure
在此,我们报告了一种有效且直接的方法,通过借氢策略,通过可回收的含镉配位聚合物催化氨基喹啉与伯醇的反应来合成N-烷基化氨基喹啉衍生物。本工作成功设计并制备了一种新型配位聚合物[Cd(CIA)(phen) 2 (H 2 O)] n 。分子结构通过单晶X射线衍射证实,并通过PXRD、FT-IR、TGA和XPS充分表征。重要的是,该聚合物对2-氨基喹啉和8-氨基喹啉与廉价且低毒的醇作为烷基化剂的N-烷基化反应表现出高催化活性,产率高达95%。有趣的是,目前的合成方案已成功应用于几种生物活性化合物的克级合成。此外,还进行了一些对照反应来研究这种转化的可能机制。最后,回收实验表明镉配位聚合物对借氢反应表现出良好的回收性能。
Ligand-free Iron(II)-Catalyzed N-Alkylation of Hindered Secondary Arylamines with Non-activated Secondary and Primary Alcohols <i>via</i>
a Carbocationic Pathway
作者:Onkar S. Nayal、Maheshwar S. Thakur、Manoranjan Kumar、Neeraj Kumar、Sushil K. Maurya
DOI:10.1002/adsc.201701183
日期:2018.2.15
Secondary benzylic alcohols represent a challenging class of substrates for N‐alkylation of amines. Herein, we describe an iron(II)‐catalyzed eco‐friendly protocol for N‐alkylation of secondary arylamines with secondary benzyl alcohols through a carbocationic pathway instead of the known borrowinghydrogen transfer (BHT) approach. Transiently generated carbocations, produced from alcohols via self‐condensation