Reductive amination of various ketones and aldehydes by transferhydrogenation under aqueous conditions has been developed, by using cyclometallated iridium complexes as catalysts and formate as hydrogen source. The pH value of the solution is shown to be critical for a high catalytic chemoselectivity and activity, with the best pH value being 4.8. In comparison with that in organic solvents, the reductive
Graphene-supported NiPd alloy nanoparticles: A novel and highly efficient heterogeneous catalyst system for the reductive amination of aldehydes
作者:Bilal Nişancı、Khadijeh Ganjehyan、Önder Metin、Arif Daştan、Béla Török
DOI:10.1016/j.molcata.2015.08.022
日期:2015.12
and highly efficient heterogeneous catalytic reductiveamination of aldehydes is described. The recently developed graphene supported NiPd alloy nanoparticle (G-NiPd) catalyst using ammonia borane (AB) as a green, stable and safe hydrogen donor was used in a water/methanol mixture (v/v = 2/3) under ambient conditions. The catalytic system was successfully applied in the reductiveamination of various
描述了一种新颖且高效的醛的异相催化还原胺化。使用氨硼烷(AB)作为绿色,稳定和安全的氢供体的最新开发的石墨烯负载NiPd合金纳米颗粒(G-NiPd)催化剂在环境条件下的水/甲醇混合物(v / v = 2/3)中使用。该催化体系已成功应用于各种取代的醛与胺的胺化反应中,并在6小时内以(高达)99%的收率获得了相应的产物。G-NiPd催化剂最多可循环使用五次,而产物收率没有任何重大损失。
Selective Synthesis of Secondary Amines via <i>N</i>-Alkylation of Primary Amines and Ammonia with Alcohols by Supported Copper Hydroxide Catalysts
作者:Jinling He、Kazuya Yamaguchi、Noritaka Mizuno
DOI:10.1246/cl.2010.1182
日期:2010.11.5
The N-alkylation of primaryamines and ammonia (in situ generated from urea or aqueous ammonia) with alcohols to secondary amines was efficiently promoted by supported copper hydroxide catalysts, C...
伯胺和氨(由尿素或氨水原位生成)与醇类的 N-烷基化反应可通过负载型氢氧化铜催化剂、C...
A novel ruthenium-catalyzed amination of primary and secondary alcohols
An improved method for the N-alkylation of primary amines with primary and secondary alcohols has been developed. Novel, effective catalyst systems, for example, Ru3(CO)12 combined with tri-o-tolylphosphine or n-butyl-di-1-adamantylphosphine, allow for aminations in a good yield under comparatively mild conditions.
Separation of enantiomers as differently sized pseudoenantiomeric salts
作者:David E. Bergbreiter、Li Zhang
DOI:10.1039/c39930000596
日期:——
Ethylene oligomers terminally functionalized so as to contain a chiral amine are used either alone or in the presence of a structurally and chemically similar low molecular mass antipode to separate a racemic sulfonic acid.