Tungsten‐Catalyzed Direct
<i>N</i>
‐Alkylation of Anilines with Alcohols
作者:Xiao‐Bing Lan、Zongren Ye、Chenhui Yang、Weikang Li、Jiahao Liu、Ming Huang、Yan Liu、Zhuofeng Ke
DOI:10.1002/cssc.202002830
日期:2021.2.5
tungsten‐catalyzed N‐alkylation reaction of anilines with primary alcohols via BH/HA. This phosphine‐free W(phen)(CO)4 (phen=1,10‐phenthroline) system was demonstrated as a practical and easily accessible in‐situ catalysis for a broad range of amines and alcohols (up to 49 examples, including 16 previously undisclosed products). Notably, this tungsten system can tolerate numerous functional groups,
Mimicking transition metals in borrowing hydrogen from alcohols
作者:Ananya Banik、Jasimuddin Ahmed、Swagata Sil、Swadhin K. Mandal
DOI:10.1039/d1sc01681d
日期:——
Borrowinghydrogen from alcohols, storing it on a catalyst and subsequent transfer of the hydrogen from the catalyst to an in situ generated imine is the hallmark of a transition metal mediated catalytic N-alkylation of amines. However, such a borrowinghydrogen mechanism with a transition metal free catalytic system which stores hydrogen molecules in the catalyst backbone is yet to be established
从醇中借用氢气,将其储存在催化剂上,然后将氢气从催化剂转移到原位生成的亚胺,这是过渡金属介导的胺催化N-烷基化的标志。然而,这种在催化剂主链中储存氢分子的无过渡金属催化系统的借氢机制尚未建立。在此,我们证明苯酚基配体可以模仿过渡金属在储存和转移氢分子中的作用,从而导致借氢介导的醇类苯胺烷基化,包括广泛的底物范围。通过各种光谱技术、氘标记实验和 DFT 研究表征几种中间体,对机制途径进行了仔细检查,得出的结论是,基于苯酚基的主链通过脱芳构化过程依次添加 H + 、 H˙ 和一个电子,随后将其用作还原剂。相当于催化方式中的C-N双键。
Cooperative catalysis of molybdenum with organocatalysts for distribution of products between amines and imines
作者:Di Wu、Qingqing Bu、Cheng Guo、Bin Dai、Ning Liu
DOI:10.1016/j.mcat.2021.111415
日期:2021.3
Multi-amino groups and nitrogen donors compound was discovered as an organocatalyst for N-alkylation of alcohols with amines in the presence of Mo(CO)6. The Mo(CO)6/organocatalyst binary system has shown to be a highly active catalyst for the N-alkylation reaction between alcohols and amines with excellent tolerance of variable starting materials bearing different functional groups. Of particular note
Ruthenium-Catalyzed Nitro and Nitrile Compounds Coupling with Alcohols: Alternative Route for N-Substituted Amine Synthesis
作者:Xinjiang Cui、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1002/chem.201003095
日期:2011.2.25
The one‐pot synthesis of N‐substituted secondary amines from nitrobenzenes and benzonitriles has been developed (see scheme). This report presents a versatile and simple method for the synthesis of N‐substituted amines in excellent yield and high efficiency from nitro and nitrile compounds with alcohols.
Fe2O3-supported nano-gold catalyzed one-pot synthesis of N-alkylated anilines from nitroarenes and alcohols
作者:Qiling Peng、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1039/c1cc11057h
日期:——
Here, we show the one-step synthesis of N-alkylated anilines from nitrobenzenes and alcohols catalyzed by nano-gold catalyst. The yields to N-alkylated anilines were ∼90% under mild conditions. The mechanism of this reaction was explored. It shows promise for clean and simple synthesis of N-alkylated anilines.