نتایج جستجو برای: pyrroles

تعداد نتایج: 1881  

Journal: :Organic letters 2016
Guoquan Sun Shuya Ren Xinhai Zhu Manna Huang Yiqian Wan

The indirect electroreductive coupling of aryl halides and pyrroles was successfully conducted using a catalytic amount of perylene bisimide as a mediator in 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide ([EMIM]NTf2)/DMSO.

Journal: :Organic letters 2005
Zhuqing Liu Jon D Rainier

This manuscript describes facile ring-opening/cross-metathesis (ROCM) reactions between unsymmetrical norbornene derivatives and electron-rich olefins in the presence of the second-generation Grubbs' catalyst to generate highly substituted furans and pyrroles.

Journal: :Chemical communications 2014
Qin Zeng Li Zhang Jieru Yang Bing Xu Yuanjing Xiao Junliang Zhang

The IPrAuNTf2/HNTf2 co-catalyzed cyclization of N-(2-perfluoroalkyl-3-alkynyl) hydroxylamines produces pyrroles in moderate to excellent yield, whereas the AgOTf-catalyzed reaction affords cyclic nitrones in high yields.

Journal: :Chemical communications 2014
Manjusha V Karkhelikar Rajeev R Jha B Sridhar Pravin R Likhar Akhilesh K Verma

An efficient approach for the synthesis of pyrrolo[3,2-c]quinolines (the core nucleus of the natural product martinellic acid) from protected 2-alkynylanilines via the regioselective formation of pyrroles followed by Heck and intramolecular Michael addition has been described.

Journal: :Organic chemistry frontiers 2021

This review discusses total syntheses of pyrrole-containing natural products over the last ten years, highlighting recent advances in chemistry pyrroles context their innate reactivity, and preparation complex settings.

Journal: :ACS Sustainable Chemistry & Engineering 2022

Pyrroles are important compounds present in biological systems, used for drug synthesis and material chemistry. A typical strategy the pyrrolic ring formation is centered on Paal–Knorr reaction, where 1,4-dicarbonyl react with amines giving N-substituted pyrrole derivatives. Often, main problem of this approach availability appropriate carbonyl compounds. Here, we report a sustainable carboxyli...

2001
Jonathan L. Sessler Rebecca S. Zimmerman Christophe Bucher Vladimír Král Bruno Andrioletti

Calixphyrins are a class of hybrid molecules that lie at the structural crossroads between porphyrins and calixpyrroles. Porphyrins, long known for their versatile metal cation coordination chemistry, are macrocycles that contain only sp2-hybridized bridging meso carbon atoms within their framework. Calix[n]pyrroles, on the other hand, are porphyrin analogs that contain pyrroles bridged exclusi...

Hassan Sanati Ramin Ghorbani-Vaghei, Sedigheh Alavinia

Substituted pyrroles are an essential class of heterocyclic compounds. In this research, an efficient and eco-friendly method has been developed for the synthesis of pyrrole derivatives from the reaction of 2,5-hexanedione and primary amines. Magnetic nanoparticles supported on functionalized. 7-aminonaphthalene-1,3-disulfonic acid-functionalized. silica (Fe3O4@SiO2@Propyl–ANDSA) has been inves...

Journal: :European Journal of Organic Chemistry 2021

Calix[4]pyrroles can be obtained from the efficient preprogrammed condensation between acetone and pyrrole. This reaction forms attractive macrocycle resembling in its constitution, but not oxidation state, to porphyrin structure, prominently present vital “pigments of life”. Calix[2]pyrrolidine[2]pyrrole calix[4]pyrrolidine, partially totally reduced version macrocycle, became accessible throu...

Journal: :Organic & biomolecular chemistry 2015
Ramakanth Pagadala Devendar Reddy Kommidi Shravankumar Kankala Suresh Maddila Parvesh Singh Brenda Moodley N A Koorbanally Sreekantha B Jonnalagadda

A one-pot green protocol involving four-components in aqueous medium is developed to synthesize highly-functionalized pyrroles in good yields. Two of the newly synthesized compounds were subjected to in silico analysis on the Pharm Mapper web-server and the human mitogen-activated protein kinase1 (MEK1) enzyme was identified as a potential target protein for these compounds. For target validati...

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