نتایج جستجو برای: amination

تعداد نتایج: 1883  

2017
Valerio Fasano Michael J Ingleson

Lower Lewis acidity boranes demonstrate greater tolerance to combinations of water/strong Brønsted bases than B(C6 F5 )3 , this enables Si-H bond activation by a frustrated Lewis pair (FLP) mechanism to proceed in the presence of H2 O/alkylamines. Specifically, BPh3 has improved water tolerance in the presence of alkylamines as the Brønsted acidic adduct H2 O-BPh3 does not undergo irreversible ...

Journal: :Journal of the American Chemical Society 2006
R Ian Storer Diane E Carrera Yike Ni David W C MacMillan

The first enantioselective organocatalytic reductive amination reaction has been accomplished. The development of a new chiral phosphoric acid catalyst has provided a convenient strategy for the enantioselective construction of protected primary amines and provided a highly stereoselective method for the reductive amination of heterocyclic amines. A diverse spectrum of ketone and amine substrat...

Journal: :Organic & biomolecular chemistry 2012
Ke-Yin Ye Li-Xin Dai Shu-Li You

Iridium-catalyzed asymmetric allylic amination of allylic carbonates with 2-allylanilines was realized. With a catalyst generated from 2 mol% of [Ir(dbcot)Cl](2) (dbcot = dibenzo[a,e]cyclooctatetraene) and 4 mol% of phosphoramidite ligand (L3), the amination products were obtained in up to 99% yield and 99% ee. Subjecting amination products to trifluoroacetyl protection and ring-closing-metathe...

Journal: :Organic & biomolecular chemistry 2016
Meng-Qi Yan Jia Yuan Yun-Xiao Pi Jin-Hua Liang Yan Liu Qing-Guo Wu Xue Luo Sheng-Hua Liu Jian Chen Xiao-Lei Zhu Guang-Ao Yu

A new Buchwald-type diphosphine ligand has been developed for applications in Pd-catalyzed amination reactions towards the preparation of triarylamines. The catalyst can be used to perform the amination of a diverse array of aryl and heteroaryl chlorides.

Journal: :Journal of Synthetic Organic Chemistry, Japan 1956

2013
Yasushi Obora

In this review, we summarize recent progress from our group with regard to Pd-catalyzed oxidative amination of alkenes with amines. Intermolecular oxidative amination of alkenes with secondary anilines was induced using a palladium-complex catalyst combined with molybdovanadophosphate as a co-catalyst under dioxygen, leading to allylic amines and enamines in good yields with high selectivities....

2018
Wesley Böhmer Tanja Knaus Francesco G. Mutti

The amination of alcohols is an important transformation in chemistry. The redox-neutral (i.e., hydrogen-borrowing) asymmetric amination of alcohols is enabled by the combination of an alcohol dehydrogenase (ADH) with an amine dehydrogenase (AmDH). In this work, we enhanced the efficiency of hydrogen-borrowing biocatalytic amination by co-immobilizing both dehydrogenases on controlled porosity ...

2016
Minami Odagi Yoshiharu Yamamoto Kazuo Nagasawa

An asymmetric α-amination of β-keto esters with azodicarboxylate in the presence of a guanidine-bisurea bifunctional organocatalyst was investigated. The α-amination products were obtained in up to 99% yield with up to 94% ee.

2014
M. G. Plaza C. Pevida C. F. Martín J. Fermoso J. J. Pis F. Rubiera

Two series of carbon dioxide adsorbents were prepared from almond shells, by carbonisation followed either by activation with CO2 or by heat treatment in the presence of ammonia gas (amination). Both procedures gave carbons with high CO2 adsorption capacities in pure CO2 as well as in a binary mixture of 15 % CO2 in N2. Activation with carbon dioxide significantly developed porosity in the samp...

Journal: :Organic letters 2002
Fuk Yee Kwong Artis Klapars Stephen L Buchwald

[reaction: see text] A mild method for the copper-catalyzed amination of aryl iodides is reported. This operationally simple C-N bond-forming protocol uses CuI as the catalyst and ethylene glycol as ligand in 2-propanol. A variety of functionalized aryl iodides as well as several amines were efficiently coupled using this method. This catalytic amination procedure is relatively insensitive to m...

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