Biomimetic Oxidative Deamination Catalysis via <i>ortho</i>-Naphthoquinone-Catalyzed Aerobic Oxidation Strategy
作者:Gangadhararao Golime、Ganganna Bogonda、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acscatal.8b00992
日期:2018.6.1
oxidant and nucleophile. The current aerobic deamination reaction proceeds via the ketimine formation between ortho-naphthoquinones and amines followed by the prototropicrearrangement and hydrolysis by water, representing a biomimetic oxidative deamination of amine species in the human body by the liver and kidneys. The compatibility of ortho-naphthoquinone organocatalysts with molecular oxygen and
Aerobic Oxidation of Primary Amines to Imines in Water using a Cobalt Complex as Recyclable Catalyst under Mild Conditions
作者:Susanta Hazra、Priti Pilania、Mayukh Deb、Ajay Kishor Kushawaha、Anil J. Elias
DOI:10.1002/chem.201803251
日期:2018.10.22
Oxidative coupling of primary amines to imines has been achieved by using a water soluble cobalt complex as catalyst and air as the oxidant at near ambient conditions. Aromatic, heteroaromatic and aliphatic amines were successfully converted to the corresponding imines with yields of up to 96 %. A 20 gram scale reaction for the synthesis of imine from benzylamine in good yield is also demonstrated
伯胺与亚胺的氧化偶联已通过在近乎环境条件下使用水溶性钴配合物作为催化剂并使用空气作为氧化剂来实现。芳香族,杂芳香族和脂肪族胺已成功转化为相应的亚胺,产率高达96%。用该方法还证明了20克规模的反应,用于从苄胺以高收率合成亚胺。已经发现该催化剂可重复使用多达五个循环。它高效,周转率(TON)高达128,并显示化学选择性,唯一的副产物是水和氨。对照实验和机理研究表明,Co II / Co III催化循环负责这些氧化转化。该反应的一些反应性中间体也已经被分离和结构表征。
Transition Metal-Catalyzed C-H Amination Using Unactivated Amines
申请人:Warren Timothy H.
公开号:US20110213146A1
公开(公告)日:2011-09-01
One aspect of the invention relates to a method of animation or amidation, comprising the step of combining a substrate, comprising a reactive C—H bond, and an amine or amide, comprising a reactive N—H bond, in the presence of an oxidizing agent and a metal-containing catalyst, thereby forming a product with a covalent bond between the carbon of the reactive C—H bond and the nitrogen of the reactive N—H bond.
PROCESS FOR DIASTEREOSELECTIVE CONVERSION OF CHIRAL IMINES
申请人:Siegel Wolfgang
公开号:US20100274053A1
公开(公告)日:2010-10-28
Diastereoselective conversion of chiral imines of the formula I to amines of the formula II
where the R
1
to R
4
radicals are each as defined in the description and R
1
and R
2
are different than one another, by converting the imine of the formula I in the presence of hydrogen and a heterogeneous copper-containing catalyst.
Carbazoquinocin Analogues as Small Molecule Biomimetic Organocatalysts in Dehydrogenative Coupling of Amines
作者:Samrat Kundu、Chayan Ghosh、Abhisek Metya、Ankush Banerjee、Modhu Sudan Maji
DOI:10.1021/acs.orglett.4c00229
日期:2024.3.1
biomimetic ortho-quinone catalysts structurally resembling carbazoquinocin alkaloids have been introduced to promote tunable, metal cocatalyst-free, organocatalytic, dehydrogenative amineoxidationunderaerobicconditions. Differently substituted benzyl amines were tolerated under optimized conditions to provide imines in excellent yields. Further efficacy of the catalyst was demonstrated by synthesizing