Arene diruthenium(II)‐mediated synthesis of imines from alcohols and amines under aerobic condition
作者:Veerappan Tamilthendral、Rengan Ramesh、Jan Grzegorz Malecki
DOI:10.1002/aoc.6122
日期:2021.3
the newly synthesized dinuclear arene Ru(II) complex were demonstrated towards the synthesis of imines from coupling of alcohols and amines in the aerobic condition. Analytical and various spectral methods have been used to establish the unprecedented formation of the new thiolato‐bridged dinuclear ruthenium complex. The molecular structure of the titled complex was evidenced with aid of X‐ray crystallographic
and the catalyst can be easily recovered without major ruthenium loss.Graphical AbstractImines were synthesized from the cross-coupling of alcohols with amines catalyzed by activated carbon (AC) supported ruthenium nanoparticles under atmospheric molecular oxygen without aid of any additives. This protocol is simple, efficient, and environment friendly, and the readily preparedcatalyst5%Ru/AC showed
Substitution of alkylhalides for the synthesis of amines is a relevant target for synthetic chemists. Secondary amines can be obtained in a one pot-one step reaction from secondary and benzylic alcohols and aniline over a heterogeneous copper catalyst. The process does not require any additive, is intrinsically safe and produces no waste.
Highly chemoselective synthesis of imine over Co/Zn bimetallic MOFs derived Co3ZnC-ZnO embed in carbon nanosheet catalyst
作者:Wei She、Jing Wang、Xuewei Li、Jingfang Li、Guijie Mao、Weizuo Li、Guangming Li
DOI:10.1016/j.jcat.2021.07.005
日期:2021.9
thickness of ca. 5.0 nm was fabricated through the direct pyrolysis of a Co/Zn bimetallic MOFs at 500 °C (named as Co3ZnC-ZnO/NC-500). Surprisingly, the developed Co3ZnC-ZnO/NC-500 catalyst delivers 99.9 % conversion of nitrobenzene and 98.5 % selectivity to N-benzylideneaniline in one-pot reductive amination of nitrobenzene with benzaldehyde. Various characterizations (including as SEM, XRD, TEM, AFM, XPS
通过硝基芳烃与芳香醛的还原胺化一锅法直接合成亚胺仍然是一个巨大的挑战,部分原因是亚胺过度氢化成仲胺。在本文中,一种新型的 Co 3 ZnC 和 ZnO 负载在厚度为约 1 的N 掺杂碳纳米片催化剂上。通过在 500°C 下直接热解 Co/Zn 双金属 MOF(命名为 Co 3 ZnC-ZnO/NC-500)制造了 5.0 nm 。令人惊讶的是,在硝基苯与苯甲醛的一锅还原胺化反应中,开发的 Co 3 ZnC-ZnO/NC-500 催化剂提供了 99.9% 的硝基苯转化率和 98.5% 的N-亚苄基苯胺选择性。各种表征(包括 SEM、XRD、TEM、AFM、XPS、拉曼和 N 2吸附-解吸)表明,生成的 Co 3 ZnC 合金的尺寸小、结构缺陷丰富、比表面积更大(105.5 m 2 ·g -1)以及更多的碱性位点是 Co 3出色的催化活性的原因。用于串联反应的 ZnC-ZnO/NC-500 催化剂。此外,Co
A Route to Polysubstituted Aziridines from Carbenes and Imines through a Nondiazo Approach
作者:Hejiang Luo、Kai Chen、Huanfeng Jiang、Shifa Zhu
DOI:10.1021/acs.orglett.6b02429
日期:2016.10.21
for the synthesis of polysubstituted aziridines utilizing enynones and imines is described. This transformation is achieved through the reaction of imines with donor/donor carbene intermediates, which were generated in situ from the cyclization of enynones. Furthermore, the resulted aziridines were good 1,3-dipoles, which could be efficiently trapped by dipolarophiles to give five-membered heterocycles