Bimetallic Ag–Cu alloy nanoparticles as a highly active catalyst for the enamination of 1,3-dicarbonyl compounds
作者:Lipeeka Rout、Aniket Kumar、Rajendra S. Dhaka、Priyabrat Dash
DOI:10.1039/c6ra04569c
日期:——
Bimetallicnanoparticles, particularly those based on copper, have recently attracted a great deal of attention for the development of low cost and highlyactive catalysts due to the synergistic interaction between individual metal components. In this work, bimetallic Ag–Cu alloynanoparticles were explored as a highlyactive and reusable catalyst for the enamination of 1,3-dicarbonyls using diverse
Oxidative Coupling of Enamines and Disulfides<i>via</i>Tetrabutylammonium Iodide/<i>tert-</i>Butyl Hydroperoxide-Mediated Intermolecular Oxidative C(<i>sp</i><sup><i>2</i></sup>)S Bond Formation Under Transition Metal-Free Conditions
作者:Jiyun Sun、Daisy Zhang-Negrerie、Yunfei Du
DOI:10.1002/adsc.201501099
日期:2016.6.30
compounds with disulfides in the presence of tert‐butyl hydroperoxide and a catalytic amount of tetrabutylammonium iodide conveniently afforded a variety of α‐thioenamine compounds through the intermolecular oxidative C(sp2)S coupling. Incorporating both of the sulfide moieties in the disulfides into the final products under oxidative conditions, this novel approach exhibits the feature of atom efficiency
A catalyst-free and convenient approach for the preparation of cyclohexa-1,3-dienecarboxylate derivatives is described. This three-componentreaction between primary amines, alkyl acetoacetate, and dibenzylideneacetone proceeds under solvent-free condition in good to excellent yields. primary amines - alkyl acetoacetate - dibenzylideneacetone - cyclohexa-1,3-dienecarboxylate - solvent-free
A new method for the enamination of 1,3-dicarbonyl compounds catalyzed by laccase in water
作者:Hong Zhang、Zhi Wang、Chunyu Wang、Haoran Wang、Tiexin Cheng、Lei Wang
DOI:10.1039/c4ra02650k
日期:——
A new method for the enamination of 1,3-dicarbonylcompoundscatalyzed by laccase in water is described for the first time. Besides providing a green and efficient method for the synthesis of enaminones, this study extends the applicability of laccase in organic synthesis.
Expedient, one-pot preparation of fused indoles via CAN-catalyzed three-component domino sequences and their transformation into polyheterocyclic compounds containing pyrrolo[1,2-a]azepine fragments
作者:Padmakar A. Suryavanshi、Vellaisamy Sridharan、J. Carlos Menéndez
DOI:10.1039/c004703a
日期:——
The CAN-catalyzed three-component between reaction between primary amines, β-dicarbonyl compounds and naphthoquinones or 2-bromonaphthoquinones afforded, respectively, 5-hydroxybenzo[g]indoles and benzo[f]indole-4,9-diones, the former of which were transformed into tetracyclic azepino[1,2-a]benzo[g]indole systems through a γ-alkylation/ring-closing metathesis sequence.
这 能够伯胺之间的反应之间催化的三组分, β-二羰基化合物和萘醌或2-溴萘醌分别提供了5-羟基苯并[ g ]吲哚和苯并[ f ]吲哚-4,9-二酮,它们的前者转化为四环氮杂[1,2- a ]苯并[ g ]吲哚 系统通过γ-烷基化/闭环复分解序列。