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 Reductive Ethylation of Imines with Ethanol
作者:Marie Vayer、Sara P. Morcillo、Jennifer Dupont、Vincent Gandon、Christophe Bour
DOI:10.1002/anie.201800328
日期:2018.3.12
complex as precatalyst. This approach opens new perspectives in this area as it enables the synthesis of unsymmetric tertiary amines from readily available substrates and ethanol as a C2 building block. A variety of imines bearing electron‐rich aryl or alkyl groups at the nitrogen atom could be efficiently reductively alkylated without the need for molecular hydrogen. The mechanism of this reaction, which
Ruthenium-catalyzed double-fold C–H tertiary alkoxycarbonylation of arenes using di-tert-butyl dicarbonate
作者:Xiaohu Hong、Hao Wang、Bingxin Liu、Bin Xu
DOI:10.1039/c4cc05173d
日期:——
An efficient ruthenium-catalyzed double-fold C–H bond alkoxycarbonylation of arenes was developed using commercially available Boc2O as the tertiary esterification reagent.
[EN] HYDROGENATION OF IMINES WITH RU COMPLEXES<br/>[FR] HYDROGÉNATION D'IMINES AVEC DES COMPLEXES DE RU
申请人:FIRMENICH & CIE
公开号:WO2019166578A1
公开(公告)日:2019-09-06
The present invention relates to the field of catalytic hydrogenation and to the use of ruthenium complexes having a bidentate diphosphine ligand or two monodentate phosphine ligands, two carboxylate ligands and optionally a diamine ligand in hydrogenation processes for the reduction of imines into the corresponding amines.
Enantioselective addition of various aryllithiumreagents to aromatic imines was catalyzed (20 mol-%) by readily accessible 1,2-diamines to afford a wide range of protected diarylmethylamines in up to 94 % enantiomeric excess. Furthermore, the absolute configuration of these arylation products was determined by using X-ray crystallography.
各种芳基锂试剂与芳族亚胺的对映选择性加成反应 (20 mol-%) 由易于获得的 1,2-二胺催化,得到多种保护的二芳基甲基胺,对映体过量高达 94%。此外,这些芳基化产物的绝对构型是通过使用 X 射线晶体学确定的。
Copper-Catalyzed Cross-Coupling of Imines, Acid Chlorides, and Organostannanes: A Multicomponent Synthesis of α-Substituted Amides
作者:Daniel A. Black、Bruce A. Arndtsen
DOI:10.1021/jo0503557
日期:2005.6.1
A copper-catalyzedcross-coupling of organotin reagents with imines and acid chlorides is reported. The reaction proceeds efficiently with a range of vinyl-, alkyl-, aryl- and heteroaryl-substituted organostannanes as well as a diverse set of imines of non-enolizable aldehydes. Use of chloroformates also allows for the formation of N-protected α-substituted amines. This chemistry has been applied to