prepared via simple impregnation followed by the pyrolysis process. The prepared Ru/PNC-700 catalyst demonstrated remarkable catalytic activity in terms of conversion and selectivity towards N-alkylation of anilines with benzyl alcohol and chemoselective hydrogenation of aromatic nitro compounds. In addition, local anesthetic pharmaceutical agents (e.g., butamben and benzocaine), including key drug intermediates
Room-Temperature Copper-Catalyzed Carbon-Nitrogen Coupling of Aryl Iodides and Bromides Promoted by Organic Ionic Bases
作者:Chu-Ting Yang、Yao Fu、Yao-Bing Huang、Jun Yi、Qing-Xiang Guo、Lei Liu
DOI:10.1002/anie.200903158
日期:2009.9.21
solubility alone does not explain the performance of organic ionic bases in the room‐temperature coupling of aryl iodides and even bromides with aliphatic and aromatic amines and N‐heterocycles (NuH; see scheme). Conductivity measurements show that these organic ionic bases, which contain tetraalkylammonium or ‐phosphonium cations, are readily ionized in organic solvents.
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。
A Simple Cobalt(II) Chloride Catalyzed N-Alkylation of Amines with Alcohols
Synthesis Abstract A facile cobalt-catalyzed N-alkylation of amines with alcohols using inexpensive, commercially available CoCl2·6H2O is reported. Employing this readily available cobalt catalyst, a variety of amines with wide functional group tolerance were selectively alkylated under benign conditions. A facile cobalt-catalyzed N-alkylation of amines with alcohols using inexpensive, commercially available
献给大卫·米尔斯坦教授在他的70之际个生日 作为有机合成中的专题钴的一部分出版 抽象的 据报道,使用廉价的可商购的CoCl 2 ·6H 2 O ,用醇容易地进行钴的胺催化的N-烷基化。利用这种容易获得的钴催化剂,在良性条件下选择性地烷基化了多种具有宽泛的官能团耐受性的胺。 据报道,使用廉价的可商购的CoCl 2 ·6H 2 O ,用醇容易地进行钴的胺催化的N-烷基化。利用这种容易获得的钴催化剂,在良性条件下选择性地烷基化了多种具有宽泛的官能团耐受性的胺。
A Highly Active PN<sup>3</sup> Manganese Pincer Complex Performing N-Alkylation of Amines under Mild Conditions
作者:Leonard Homberg、Alexander Roller、Kai C. Hultzsch
DOI:10.1021/acs.orglett.9b00832
日期:2019.5.3
on a nonsymmetric PN3-ligand scaffold for the N-alkylation of amines with alcohols utilizing the borrowing hydrogen methodology is reported. A broad range of anilines and the more challenging aliphatic amines were alkylated with primary and secondary alcohols. Moreover, the combination of low catalyst loadings and mild reaction conditions provides high efficiency for this atom-economic transformation