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 Simple and Efficient Metal-Free Synthesis of Tetrasubstituted Pyrroles by Iodine-Catalyzed Four-Component Coupling Reaction of Aldehydes, Amines, Dialkyl Acetylenedicarboxylates, and Nitromethane¹
作者:Biswanath Das、Nisith Bhunia、Maram Lingaiah
DOI:10.1055/s-0030-1260228
日期:2011.11
furnished the corresponding 1,2,3,4-tetrasubstituted pyrroles under reflux. The products are formed in high yields (65-88%) within 8 hours. The method is simple, efficient, cost-effective, and metal-free. 1,2,3,4-tetrasubstituted pyrroles - four-component coupling reaction - iodine - metal-free synthesis Part 230 in the series ‘Studies on Novel Synthetic Methodologies’.
An efficient and metal free method has been developed for the synthesis of polysubstituted pyrrole derivatives via intermolecular cyclo addition of substituted 1-phenyl-2-(phenylamino)-ethan-1-one /1-phenyl-2-(phenylamino)-propan-1-ones/ 2-((4-methoxyphenyl)amino)-1-(thiophen-2-yl)ethan-1-one/1-(furan-2-yl)-2-((4-methoxyphenyl)amino)ethan-1-one/ 1-(benzofuran-3-yl)-2-((4-methoxyphenyl)amino)ethan-1-one
An Efficient One-Pot, Three-Component Synthesis of Tetrasubstituted Pyrroles under Catalyst- and Solvent-Free Conditions
作者:C. Uma Maheswari、Gnanaoli Karthiyayini、Deepan Babu Rajkumar、Subbiah Nagarajan、Vellaisamy Sridharan
DOI:10.1055/a-2113-2981
日期:2023.10
The reaction proceeds via a nucleophilic attack of primaryamine on dialkyl acetylenedicarboxylate followed by Michael addition with β-nitrostyrene and successive intramolecular cyclization and aromatization to yield 1,2,3,4-tetrasubstituted pyrroles in good to excellent yields. A wide range of primaryamines including aromaticamines and benzylamines were coupled with differently substituted β-nitrostyrenes