Cooperative Indium(III)/Silver(I) System for Oxidative Coupling/Annulation of 1,3-Dicarbonyls and Styrenes: Construction of Five-Membered Heterocycles
作者:Tae Yun Ko、So Won Youn
DOI:10.1002/adsc.201600280
日期:2016.6.16
A cooperative indium(III)/silver(I) system for the synthesis of various five‐membered heterocycles, including dihydrofurans, pyrroles, spirolactones, and spiroiminolactones, through the sequential oxidative coupling/annulation reaction of 1,3‐dicarbonyl compounds with styrenes has been developed. Four different heterocyclic systems were successfully synthesized depending on the substitution pattern
Multicomponent Approach Towards the Synthesis of Substituted Pyrroles under Supramolecular Catalysis Using<i>β</i>-Cyclodextrin as a Catalyst in Water Under Neutral Conditions
Synthesis of substitutedpyrroles in H2O by using β‐cyclodextrin as a supramolecularcatalyst is described. This reaction has several advantages over existing methods and provides substitutedpyrroles in good‐to‐excellent yields (79–89%). The supramolecularcatalysis of the reaction was studied using 1H‐NMR spectroscopy. β‐Cyclodextrin can be recovered and reused several times without loss of activity
Sonochemically assisted synthesis of N-substituted pyrroles catalyzed by ZnO nanoparticles under solvent-free conditions
作者:Ashraf S Shahvelayati、Maryam Sabbaghan、Solmaz Banihashem
DOI:10.1007/s00706-016-1904-6
日期:2017.6
AbstractAn efficient and rapid synthesis of 1,2,3,5-tetrasubstituted pyrrole derivatives from a one-pot multicomponent reaction of amines, 1,3-dicarbonyl compounds, and α-haloketones in the presence of ZnO nanoparticles catalyst under ultrasonic irradiation and solvent-free conditions is described. Graphical abstract