Hydrogen-free reductive amination using iron pentacarbonyl as a reducing agent
作者:Oleg I. Afanasyev、Dmitry L. Usanov、Denis Chusov
DOI:10.1039/c7ob02795h
日期:——
We developed solvent-free reductiveaminationwithout an externalhydrogensource using iron pentacarbonyl as a reducing agent. Neither a catalyst nor any other additives were employed. Various types of substrates are suitable for the reaction, including those with low reactivity, e.g. benzophenone. Among others, the protocol tolerates bromo-, cyano-, benzyloxy-, pyrimidyl and styryl moieties.
Anthracene–rhodium complexes with metal coordination at the central ring – a new class of catalysts for reductive amination
作者:Ekaterina Kuchuk、Karim Muratov、Dmitry S. Perekalin、Denis Chusov
DOI:10.1039/c8ob02561d
日期:——
coordinated at the central ring was applied in catalysis for the first time. As a result, a simple and efficient protocol for reductive amination that involves CO as a reducing agent has been developed. The rhodium complex [(cyclooctadiene)Rh(C10H4Me2(OMe)4)]+ (1 mol%) catalyses such reactions undermildconditions (40–130 °C) and produces a variety of amines in good yields (74–95%) without affecting the functional
首次在中心环上配位了具有金属配位作用的新型蒽配合物。结果,已经开发出一种简单有效的还原胺化方案,其中涉及CO作为还原剂。铑配合物[(环辛二烯)Rh(C 10 H 4 Me 2(OMe)4)] +(1 mol%)在温和的条件下(40-130°C)催化这种反应,并以高收率产生多种胺( 74–95%),而不会影响官能团。该协议适用于醛(芳族和脂族),酮(芳族和脂族)和胺(芳族和脂族;伯和仲)的所有组合。
Sodium Hypophosphite as a Bulk and Environmentally Friendly Reducing Agent in the Reductive Amination
作者:Fedor Kliuev、Anton Kuznetsov、Oleg I. Afanasyev、Sofiya A. Runikhina、Ekaterina Kuchuk、Evgeniya Podyacheva、Alexey A. Tsygankov、Denis Chusov
DOI:10.1021/acs.orglett.2c02807
日期:2022.10.28
NaH2PO2 was found to promote reductive amination. Being nontoxic, stable, environmentally benign, and available in bulk amounts, this reducing agent showed a powerful potential to compete with classical reductants applied in the target process. An E factor of 1 was achieved for the substrate scope. Different carbonyl compounds reacted with amines under the developed conditions. The reaction demonstrated
发现NaH 2 PO 2促进还原胺化。这种还原剂无毒、稳定、对环境无害且可大量使用,显示出与目标工艺中应用的经典还原剂竞争的强大潜力。底物范围的E因子为 1。在开发的条件下,不同的羰基化合物与胺反应。该反应显示出与多种官能团的良好相容性。反应条件放大至 200 倍。