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We have developed an organocatalyzed three-component reaction of 1,2-diones, aldehydes and arylamines, which provides an efficient approach to access polysubstituted pyrroles. In the catalysis of 4-methylbenzenesulfonic acid monohydrate, the reactions of a wide range of 1,2-diones, arylamines and aldehydes took place smoothly to generate the corresponding polysubstituted pyrroles in acceptable ...

Many pharmaceutical agents include piperazines or oxopiperazines as part of their core structures. The presence of substituents on these heterocycles has a significant influence on the biological activity, thus the search for efficient routes to control the substitution at different ring positions might have a crucial impact, especially to promote the use of such scaffolds in SAR studies. Many ...

A novel silver-mediated highly selective synthesis of polysubstituted pyrroles by the C-H/C-H oxidative cross-coupling/cyclization of terminal alkynes with β-enamino esters has been developed. This protocol represents a simple, efficient and selective way to construct polysubstituted pyrroles in good yields from basic chemical materials.

Halogenated quinazolinones and quinazolines are versatile synthetic intermediates for the metal-catalyzed carbon-carbon bond formation reactions such as the Kumada, Stille, Negishi, Sonogashira, Suzuki-Miyaura and Heck cross-coupling reactions or carbon-heteroatom bond formation via the Buchwald-Hartwig cross-coupling to yield novel polysubstituted derivatives. This review presents an overview ...

Considering various biomedical significance & with a view of pharmacological actions compound belong to this class, new series N-(substituted phenyl)-2-methyl-4-(2-(6-oxo-1-phenyl-1-6-dihydro-[2-3-bipyridin]-5-yl)phenyl)-1-4-dihydro pyrimido [1, 2-a] benzimidazole-3-carboxamide ware prepared. The formation the was accomplished by cyclocondensation 2-(1, 2-dihydro-2-oxo-1-phenyl-5-(pyridin-2...

A palladium-catalyzed one-pot method for the synthesis of quinolines from commercial or readily available 2-amino aromatic ketones and alkynes is reported for the first time. This transformation offers an alternative method for the synthesis of polysubstituted quinoline.