通过溶胶-凝胶法,使用廉价的原料制备了由氧化钛包裹的碘化亚铜纳米颗粒组成的催化剂,并通过对环境有益的,可持续的方案成功地将其用于炔烃的氧化酰胺化。彻底讨论了这种转变的作用机理。通过简单的方法,以中等到高收率,从多种富电子和不良底物合成各种α-酮基芳基酰胺的类似物,阐明了催化剂的坚固性,直至产生良好的可回收性。在无溶剂和有氧条件下进行五个循环。CuI @ TiO 2的化学性质,形貌和负载 通过TEM,SEM,XPS,EDX,粉末XRD,BET,TGA和ICP-MS对纳米催化剂进行了研究。
Visible‐Light Mediated Photooxidative Synthesis of α‐Keto Amides
作者:Aparna Monga、Amar Prakash Pandey、Anuj Sharma
DOI:10.1002/adsc.201900279
日期:2019.8.5
Photocatalytic amidation of α‐keto aldehydes is herein investigated. This transformation was achieved using rose bengal as photocatalyst at room temperature under ambient air and under irradiation of a 20 W white LED bulb. The method is mild, efficient and environmentally benign. This photocatalytic method is compatible with different unsubstituted and substituted α‐keto aldehydes having electron‐withdrawing
Chemical conversion of β-O-4 lignin linkage models through Cu-catalyzed aerobic amide bond formation
作者:Jian Zhang、Yu Liu、Shunsuke Chiba、Teck-Peng Loh
DOI:10.1039/c3cc46912c
日期:——
Methods for conversion of the lignin β-O-4 models into amide derivatives and phenols have been developed, which is achieved via chemo-selective oxidation of the secondary benzylic alcohol and subsequent Cu-catalyzed aerobic amide bond formation.
has been accomplished using readily available cinnamic acids/arylacetic acids and 2° amines in an open atmosphere. The reaction between cinnamic acid and amine involves the formation of enamine followed by its aerobic oxidation, whereas the reaction of arylacetic acid with amine involves amide formation followed by benzylic methylene oxidation.
Silyllithium-Initiated Coupling of α-Ketoamides with <i>tert</i>-Butanesulfinylimines for Stereoselective Synthesis of Enantioenriched α-(Silyloxy)-β-amino Amides
A silyllithium-initiated coupling of α-ketoamides with tert-butanesulfinylimines was developed for the efficient, stereoselective synthesis of enantioenrichedα-(silyloxy)-β-amino amides. Nucleophilic addition of silyllithium to α-ketoamides, followed by 1,2-Brook rearrangement, generates nucleophilic enolates, which are then intercepted by chiral imines to provide three-component coupling products
Aerobic oxidative amidation of alkynes using titanium oxide encapsulated cuprous iodide nanoparticles (CuI@TiO<sub>2</sub>)
作者:Pratip Kumar Dutta、Basabbijayi Dhar、Subhabrata Sen
DOI:10.1039/c8nj01506f
日期:——
successfully in the oxidative amidation of alkynes via an environmentallybenign and sustainable protocol. The mechanism of action of this transformation was thoroughly discussed. The robustness of the catalyst was elucidated by the synthesis of diverse analogues of α-ketoarylamide from a variety of electron rich and poor substrates via a simpleprocedure in moderate to high yields, with no generation of toxic
通过溶胶-凝胶法,使用廉价的原料制备了由氧化钛包裹的碘化亚铜纳米颗粒组成的催化剂,并通过对环境有益的,可持续的方案成功地将其用于炔烃的氧化酰胺化。彻底讨论了这种转变的作用机理。通过简单的方法,以中等到高收率,从多种富电子和不良底物合成各种α-酮基芳基酰胺的类似物,阐明了催化剂的坚固性,直至产生良好的可回收性。在无溶剂和有氧条件下进行五个循环。CuI @ TiO 2的化学性质,形貌和负载 通过TEM,SEM,XPS,EDX,粉末XRD,BET,TGA和ICP-MS对纳米催化剂进行了研究。