在此,我们报道了第一个 Fe II催化的胺类有氧仿生氧化反应。这种氧化反应涉及几个电子转移步骤,受到呼吸链中生物氧化的启发。从胺到分子氧的电子转移由两个耦合催化氧化还原系统辅助,这降低了能垒并提高了氧化反应的选择性。铁氢转移络合物被用作底物选择性脱氢催化剂,同时双功能对苯二酚/钴希夫碱络合物作为混合电子转移介体。各种伯胺和仲胺在空气中被氧化成其相应的醛亚胺或酮亚胺,收率良好至优异。
Iron-Catalyzed Nitrene Transfer Reaction of 4-Hydroxystilbenes with Aryl Azides: Synthesis of Imines via C═C Bond Cleavage
作者:Yi Peng、Yan-Hui Fan、Si-Yuan Li、Bin Li、Jing Xue、Qing-Hai Deng
DOI:10.1021/acs.orglett.9b03160
日期:2019.10.18
C═C bond breaking to access the C═N bond remains an underdeveloped area. A new protocol for C═C bond cleavage of alkenes under nonoxidative conditions to produce imines via an iron-catalyzed nitrene transfer reaction of 4-hydroxystilbenes with aryl azides is reported. The success of various sequential one-pot reactions reveals that the good compatibility of this method makes it very attractive for
The catalytic transfer hydrogenation of imines and the reductive amination of carbonyl compounds have been thoroughly investigated with a cyclooctene‐derived (cyclopentadienone)iron pre‐catalyst. Additionally, enantioselective ketimine reduction with a chiral (cyclopentadienone)ironcomplex is reported here for the first time.
Carbon monoxide-driven osmium catalyzed reductive amination harvesting WGSR power
作者:Klim O. Biriukov、Mikhail M. Vinogradov、Oleg I. Afanasyev、Dmitry V. Vasilyev、Alexey A. Tsygankov、Maria Godovikova、Yulia V. Nelyubina、Dmitry A. Loginov、Denis Chusov
DOI:10.1039/d1cy00695a
日期:——
First osmium-catalyzed reductive amination under the water gas–shift reaction conditions was developed. Proposed catalytic system demonstrates high performance even at the catalyst loading as low as 0.0625 mol%.
Cyclobutadiene Metal Complexes: A New Class of Highly Selective Catalysts. An Application to Direct Reductive Amination
作者:Oleg I. Afanasyev、Alexey A. Tsygankov、Dmitry L. Usanov、Dmitry S. Perekalin、Nikita V. Shvydkiy、Victor I. Maleev、Alexander R. Kudinov、Denis Chusov
DOI:10.1021/acscatal.5b02916
日期:2016.3.4
A catalyst of a new type, cyclobutadiene complex [(C4Et4)Rh(p-xylene)]PF6, was found to promote selective reductive amination in the presence of carbon monoxide under mild conditions (1–3 bar, 90 °C). The reaction demonstrated perfect compatibility with a wide range of functional groups prone to reduction by conventional reducing agents. The developed system represents the first systematic investigation
发现一种新型的环丁二烯络合物[(C 4 Et 4)Rh(对二甲苯)] PF 6的催化剂可在温和条件下(1-3 bar,90° C)。该反应证明与易于被常规还原剂还原的各种官能团具有完美的相容性。开发的系统代表了环丁二烯金属配合物作为催化剂的首次系统研究。