胺的光催化选择性转化是一种绿色且具有成本效益的技术,可在化学工业中获得增值产品。在这项工作中,一系列基于铋的光催化剂包括Bi 2 MoO 6,Bi 2 WO 6,Bi 5 O 7 Cl,Bi 5 O 7 Br,Bi 5 O 7 I,BiPO 4,BiVO 4,Bi 2 O 3和各种形态Bi 2 O 2 CO 3(花状,海绵状,板状和球形)被合成并用于苄胺的需氧氧化偶联。发现花状的Bi 2 O 2 CO 3表现出最高的光催化活性,其中在室温下获得了100%的苄胺转化率和99.0%的N-亚苄基苄胺选择性。而且,进一步研究了各种芳族和脂族胺的光催化氧化偶联过程,并且获得了相应产物的优异的产率和选择性。然后,基于催化剂的表征结果(XRD,SEM,BET和XPS等),花状Bi 2 O 2 CO具有较高的光催化活性。3归因于薄的纳米花瓣,低的带隙,形态和大的比表面积。最后,提出了一种可能的反应机理,用于苄胺的光催化氧化偶联。
Hydrogen telluride was found to reduce imines and enamines to the corresponding amines under mild conditions. As an application of this reduction,a new method for reductive alkylation of primary and secondary amines with ketones or aldehydes has been developed.
Unprecedented Copper(II) Complex with a Topoquinone-like Moiety as a Structural and Functional Mimic for Copper Amine Oxidase: Role of Copper(II) in the Genesis and Amine Oxidase Activity
Copper amineoxidase (CAO), consisting of the topoquinone (TPQ) cofactor, catalyzes the oxidation of primary amines to aldehyde. We have successfully addressed this issue through isolation of a copper complex which mimics the active-site structure as well as the function of CAO. This inimitable complex, consisting of two TPQ-like side-arms, formed by ambient aerial oxidation of a precursor Schiff base
Microwave-assisted direct transformation of amines to ketones using water as an oxygen source
作者:Akira Miyazawa、Kan Tanaka、Toshiyasu Sakakura、Masashi Tashiro、Hideki Tashiro、G. K. Surya Prakash、George. A. Olah
DOI:10.1039/b500541h
日期:——
Retro-reductive aminations, direct transformations of amines to ketones, were catalyzed by Pd/C in water under microwave irradiation.
回退还原胺化反应,即胺直接转化为酮的过程,在微波照射下,以Pd/C为催化剂,在水溶液中得以实现。
An Insight of the Reactions of Amines with Trichloroisocyanuric Acid
作者:Lidia De Luca、Giampaolo Giacomelli
DOI:10.1055/s-2004-830896
日期:——
as chlorinating agents and oxidants. 1 Their properties are similar to those of N-chloroamines, which, however, are less stable. A few of them are also common- ly used as chlorinating reagents and oxidants in organic synthesis: since chloroamines are easier to handle than chlorine gas or metal hypochlorites, they are widely used in organic synthesis in addition to their use in the purifi- cation of water
Site-specific catalytic activities to facilitate solvent-free aerobic oxidation of cyclohexylamine to cyclohexanone oxime over highly efficient Nb-modified SBA-15 catalysts
development of highly active and selective heterogeneous catalysts for efficient oxidation of cyclohexylamine to cyclohexanone oxime is a challenge associated with the highly sensitive nitrogen center of cyclohexylamine. In this work, dispersed Nb oxide supported on SBA-15 catalysts are disclosed to efficiently catalyze the selective oxidation of cyclohexylamine with high conversion (>75%) and selectivity