18613-55-3Relevant articles and documents
Copper-catalyzed electrophilic amination of organolithiums mediated by recoverable siloxane transfer agents
Nguyen, Minh H.,Smith, Amos B.
, p. 4872 - 4875 (2013)
The development and validation of copper-catalyzed, electrophilic amination of aryl and heteroaryl organolithiums with N,N-dialkyl-O-benzoylhydroxylamines have been achieved exploiting recoverable siloxane transfer agents. Given the ready availability of organolithium compounds, the mild reaction conditions, the ease of product purification, and the ready recovery of the siloxane transfer agents, this transformation comprises a useful tactic to access diverse aryl and heteroaryl amines.
Regioselective Synthesis of 2° Amides Using Visible-Light-Induced Photoredox-Catalyzed Nonaqueous Oxidative C-N Cleavage of N, N-Dibenzylanilines
Neerathilingam, Nalladhambi,Bhargava Reddy, Mandapati,Anandhan, Ramasamy
supporting information, p. 15117 - 15127 (2021/10/25)
A visible-light-driven photoredox-catalyzed nonaqueous oxidative C-N cleavage of N,N-dibenzylanilines to 2° amides is reported. Further, we have applied this protocol on 2-(dibenzylamino)benzamide to afford quinazolinones with (NH4)2S2O8 as an additive. Mechanistic studies imply that the reaction might undergo in situ generation of α-amino radical to imine by C-N bond cleavage followed by the addition of superoxide ion to form amides.
N-Benzylation of primary amines using magnetic Fe3O4 nanoparticles functionalized with hexamethylenetetramine as an efficient and recyclable heterogeneous catalyst
Ghorbani-Vaghei, Ramin,Mirzaei-Mosbat, Maryam,Noori, Samira
, (2020/06/22)
Herein we report, a new, simple and mild procedure for N-benzylation and N,N-dibenzylation of anilines through the reaction of aniline derivatives and benzyl bromide at 60 °C in EtOH in the presence of catalytic amounts of magnetic Fe3O4 nanoparticles functionalized with hexamethylenetetramine (Fe3O4?SiO2?Propyl-HMTA). The title compounds were formed in high purity and their structures characterized by spectral analysis. The results also showed that the magnetic nanoparticle catalyst had significant advantages including, simplicity of preparation, heterogeneity, stability and recyclability. Moreover, the catalyst was characterized by various methods, such as FT-IR, SEM, VSM, TEM, TGA and XRD, after the reaction to compare with its structure before reaction.
Ruthenium nanoparticle catalyzed selective reductive amination of imine with aldehyde to access tertiary amines
Li, Bin,Liu, Shun,Lin, Qiao,Shao, Yan,Peng, Shiyong,Li, Yibiao
supporting information, p. 9214 - 9217 (2018/08/23)
Reductive amination is one of the most frequently used transformations in organic synthesis. Herein, we developed a novel ruthenium nanoparticle embedded ordered mesoporous carbon catalyst (Ru-OMC) and a new hydrosilylation process for the synthesis of tertiary amines. We present a direct reductive amination of imines (CN bond) with aldehydes (CO bond) using hydrosilane as the reducing reagent under mild conditions. Moreover, the Ru-OMC catalysts can be reused for up to 14 runs without noticeably losing activity.
MIL-101(Cr) as a synergistic catalyst for the reduction of imines with trichlorosilane
Chen, Jingwen,Chen, Xiaoling,Zhang, Zhiguo,Bao, Zongbi,Xing, Huabin,Yang, Qiwei,Ren, Qilong
, p. 163 - 169 (2018/01/05)
The development of catalyst based on porous crystalline materials (PCM) constructed from metal ions or clusters and multidentate organic ligands is a topic of great interest. In view of the Lewis acidic and basic properties of PCMs, we report for the first time that MIL-101(Cr) works as a synergistic catalyst for the reduction of imines with trichlorosilane as the hydrogen source. Both ketimines and aldimines were tolerated with this protocol, giving the corresponding amines in moderate to high yields. The operational simplicity as well as mild reaction conditions renders this protocol an attractive approach for the synthesis of amines. Furthermore, a chiral MOF, CMIL-101, was also realized by grafting chiral N-formyl proline derivatives to the open metal sites. Moreover, CMIL-101 exhibited a comparable catalytic performance with its homogeneous counterpart in terms of yields and enantioselectivities.
“One pot” synthesis of tertiary amines: Ru(II) catalyzed direct reductive N-benzylation of imines with benzyl bromide derivatives
Li, Bin,Yu, Jinghao,Li, Caihua,Li, Yibiao,Luo, Jianli,Shao, Yan
supporting information, p. 137 - 141 (2016/12/26)
The direct reductive N-benzylation of imines by reaction with benzyl bromide derivatives, in the presence of [RuCl2(p-cymene)]2catalyst and PhSiH3, is performed under mild conditions without additional base. This reaction proceeds by a tandem imine hydrosilylation/nucleophilic substitution with benzyl bromide derivatives to result the tertiary amines.
Copper-catalyzed electrophilic amination using: N -methoxyamines
Fukami, Yutaro,Wada, Takamasa,Meguro, Tatsuhiko,Chida, Noritaka,Sato, Takaaki
supporting information, p. 5486 - 5489 (2016/07/06)
Copper-catalyzed electrophilic amination of a triarylboroxin using an N-methoxyamine to give quick access to a variety of anilines was reported. The reaction was especially useful for syntheses of functionalized anilines when combined with our previously reported nucleophilic addition to N-methoxyamides.
SILICON-BASED CROSS COUPLING AGENTS AND METHODS OF THEIR USE
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Paragraph 0070, (2016/02/10)
Compositions and methods using silicon-based cross-coupling agents in the formation of carbon-carbon and carbon-nitrogen bonds are described.
A process for preparing amine compound using carbon-supported cobalt-rhodium nanoparticel catalyzed hydrogen-free recuctive amination
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Paragraph 0066; 0069; 0073, (2017/04/25)
The present invention relates to hydrogen-free reductive amination of an aldehyde and/or ketone and an amine and/or nitroarene using cobalt-rhodium heterometal nanoparticles supported on carbon as a non-homogeneous catalyst. According to the present invention, it is possible to carry out amination under significantly lower pressure as compared to the reductive amination carried out in the presence of a conventional rhodium or ruthenium catalyst. In addition, there is no need for using an additional ligand, acid or base. Further, it is possible to use water generated in a reaction system by a water-gas shift reaction as a hydrogen source with no use of an external hydrogen source, and thus to use a solvent without purification. Thus, it is possible to simplify the reaction procedure. The catalyst system according to the present invention provides a simple method for preparing secondary and tertiary amines from various aldehydes and amines.
Iron-catalyzed amination of alcohols assisted by Lewis acid
Pan, Hui-Jie,Ng, Teng Wei,Zhao, Yu
supporting information, p. 11907 - 11910 (2015/07/20)
An efficient Lewis acid-assisted, iron-catalyzed amination of alcohols using borrowing hydrogen methodology was developed. In particular, silver fluoride was identified to be a highly effective additive to overcome the low efficiency in the amination of secondary alcohols catalyzed by Kn?lker's complex.