Regioselective Synthesis of 2,3,4-Trisubstituted Pyrroles via Pd(II)-Catalyzed Three-Component Cascade Reactions of Amines, Alkyne Esters, and Alkenes
作者:Xu Zhang、Xuefeng Xu、Gong Chen、Wei Yi
DOI:10.1021/acs.orglett.6b02325
日期:2016.10.7
three-component cascade reaction of diverse amines, alkyne esters, and alkenes is disclosed for the direct synthesis of diverse 2,3,4-trisubstituted pyrroles with broad functional group tolerance and in good to excellent yields. This transformation is supposed to proceed through the cascade formation of C(sp2)–C(sp2) and C(sp2)–N bonds via Pd(II)-catalyzed regioselective alkene migratory insertion, intramolecular
A series of polysubstituted pyrroles were rapidly synthesized in moderate to good yields via catalyst-free one-pot three-component reaction of 1,3-dicarbonyl compounds with primary amines and nitrostyrenes by using liquid-assisted grinding. This protocol provides several advantages over the conventional chemical synthesis, such as simple work-up procedure, wide substrate scope, short reaction time
采用液体辅助研磨,1,3-二羰基化合物与伯胺和硝基苯乙烯的无催化剂一锅三组分反应快速合成了一系列多取代吡咯,收率适中。该协议比传统的化学合成具有几个优点,例如简单的后处理程序、广泛的底物范围、短的反应时间和环境友好性。通过1 H NMR、13 C NMR 和 ESI-MS 研究证实了多取代吡咯的结构。
NiO Nanoparticles: Efficient Catalyst for Four Component Coupling Reaction for Synthesis of Substituted Pyrroles
作者:Aravind L. Gajengi、Bhalchandra M. Bhanage
DOI:10.1007/s10562-016-1762-1
日期:2016.8
aldehydes, and nitroalkanes for the synthesis of highly functionalized pyrroles using NiO NPs as a heterogeneous and robust catalyst. The developed protocol is simple, convenient, solvent free, straightforward, easy separation of catalyst and carried at room temperature. This methodology provides an alternative approach for easy access of highlysubstitutedpyrroles in moderate to very good yields using