Results 51 to 60 of about 26,582 (202)

A catalyst-controlled selective synthesis of pyridines and pyrroles [PDF]

open access: yes, 2014
We have developed a dual reaction manifold that enables selective synthesis of both pyridines and pyrroles from common substrates ??-diazo oxime ethers.
Alvarez-Corral   +55 more
core   +1 more source

Detection of reactive oxygen and nitrogen species by electron paramagnetic resonance (EPR) technique [PDF]

open access: yes, 2017
During the last decade there has been growing interest in physical-chemical oxidation processes and the behavior of free radicals in living systems. Radicals are known as intermediate species in a variety of biochemical reactions.
Gurer-Orhan, H., Saso, L., Suzen, S.
core   +2 more sources

Synthesis and Reactivity of New 1-Pentafluorophenyl-1Hpyrrole Derivatives

open access: yesMolecules, 2003
We present 1-pentafluorophenyl-1H-pyrrole and some of its electrophilic substitution reactions: formylation and acetylations. The 2-substituted products formed in these reactions are selectively and in high yield converted into 3-substituted products by ...
Daniel Végh   +1 more
doaj   +1 more source

A Novel Indium-Catalyzed Three-Component Reaction: General and Efficient One-Pot Synthesis of Substituted Pyrroles [PDF]

open access: yes, 2011
A convenient and general approach towards the synthesis of substituted pyrroles from propargylic acetates, silyl enol ethers, and primary amines was described. This novel transformation was catalyzed by indium trichloride in a one-pot synthesis, and high
Hao, Lu   +4 more
core   +1 more source

Diethyl pyrrole-2,5-dicarboxylate [PDF]

open access: yesMolbank, 2020
The title compound was obtained in moderate yield by a new and unexpected base-induced ring contraction from a 1,4-thiazine precursor. Its X-ray structure showing hydrogen bonded dimers was compared with those of other crystallographically characterised 2-acylpyrroles.
R. Alan Aitken   +3 more
openaire   +4 more sources

Selective One-Pot Multicomponent Synthesis of N-Substituted 2,3,5-Functionalized 3-Cyanopyrroles via the Reaction between α-Hydroxyketones, Oxoacetonitriles, and Primary Amines

open access: yesMolecules, 2022
A one-step, three-component reaction between α-hydroxyketones, oxoacetonitriles, and primary amines gives N-substituted 2,3,5-functionalized 3-cyanopyrroles with complete selectivity in up to 90% isolated yields.
Mengxin Xia   +2 more
doaj   +1 more source

Synthesis of pi-conjugated systems bearing thiophene and pyrrole heterocycles through palladium catalyzed cross-coupling reactions. [PDF]

open access: yes, 2016
A series of thienylpyrroles and bithienylpyrroles together with their formyl derivatives 5aed were synthesized using commercially or readily available coupling components, through three different palladium catalyzed cross-coupling reactions (Suzuki ...
Castro, M.   +2 more
core   +1 more source

Synthesis of novel pyrroles and fused pyrroles as antifungal and antibacterial agents

open access: yesJournal of Enzyme Inhibition and Medicinal Chemistry, 2021
Pyrroles and its fused forms possess antimicrobial activities, they can easily interact with biomolecules of living systems. A series of substituted pyrroles, and its fused pyrimidines and triazines forms have been synthesised, all newly synthesised ...
Rania Helmy Abd El-Hameed   +5 more
doaj   +1 more source

Development of Novel Pyrrole Derivatives and Their Cinnamic Hybrids as Dual COX-2/LOX Inhibitors

open access: yesMolecules, 2023
Molecular hybridization has emerged as a promising approach in the treatment of diseases exhibiting multifactorial etiology. With regard to this, dual cyclooxygenase-2/lipoxygenase (COX-2/LOX) inhibitors could be considered a safe alternative to ...
Viola Noti   +2 more
doaj   +1 more source

Methyl 2-amino-5-iso­propyl-1,3-thia­zole-4-carboxyl­ate [PDF]

open access: yes, 2004
The title compound, C8H12N2O2S, forms a supramolecular network based on N-HN hydrogen-bonded centrosymmetric dimers that are linked in turn by N-HO ...
Kennedy, Alan R.   +3 more
core   +1 more source

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