Results 81 to 90 of about 85,504 (285)

Pyrrole and Fused Pyrrole Compounds with Bioactivity against Inflammatory Mediators

open access: yesMolecules, 2017
A new series of pyrrolopyridines and pyrrolopyridopyrimidines have been synthesized from aminocyanopyrroles. The synthesized compounds have been characterized by FTIR, 1H-NMR and mass spectroscopy.
Samar Said Fatahala   +4 more
doaj   +1 more source

Pyrrolate-Catalyzed Conjugate Addition of Pyrrole to Electron-Deficient Alkenes

open access: yesSynlett, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Richardson, Robert D.   +2 more
openaire   +3 more sources

Accelerated gas-liquid visible light photoredox catalysis with continuous-flow photochemical microreactors [PDF]

open access: yes, 2016
In this protocol, we describe the construction and use of an operationally simple photochemical microreactor for gas-liquid photoredox catalysis using visible light.
A Günther   +26 more
core   +3 more sources

Reaction of pyrroles with ethyl 2-nitroso- and 2-azo-propenoates, and with ethyl cyanoformate N-oxide: a comparison of the reaction pathways [PDF]

open access: yes, 2012
The reaction of ethyl 2-nitrosopropenoate 2a with 1 -methylpyrrole, 2.5-dimethylpyrrole and 2.5- diphenylpyrrole has been investigated. In every case the products result from highly regioselective attack at C-2 of the pyrrole by the electrophile.
Gilchrist, Thomas L., Lemos, A.
core  

Symmetry Breaking in Pyrrolo[3,2-b]pyrroles: Synthesis, Solvatofluorochromism and Two-photon Absorption [PDF]

open access: yes, 2019
Five centrosymmetric and one dipolar pyrrolo[3,2-b]pyrroles, possessing either two or one strongly electron-withdrawing nitro group have been synthesized in a straightforward manner from simple building blocks.
Ahn, Kyo Han   +9 more
core   +1 more source

Expanded Bodipy Dyes: Anion Sensing Using a Bodipy Analog with an Additional Difluoroboron Bridge [PDF]

open access: yes, 2012
Cataloged from PDF version of article.Oxalyl-tethered pyrroles can be doubly bridged with two difluoroboron chelating units to yield bright orange dyes.
Akkaya, E. U.   +3 more
core   +1 more source

A theoretical study of the mechanism of rearrangement of dihydropyrimidines into pyrroles [PDF]

open access: yes, 2017
Pyrimidines, pyrroles, cycloreversion,CO extrusion, Two possible mechanisms for the transformation of a 1,4-dihydropyrrolo[3,2-b]pyrrole derivative into a tetrasubstituted pyrrole have been studied theoretically and one of them has been found in ...
Alkorta, I., de la Hoz, A., Elguero, J.
core  

Enantioselective Total Synthesis of Tricyclic Myrmicarin Alkaloids [PDF]

open access: yes, 2005
An enantioselective gram-scale synthesis of a key dihydroindolizine intermediate for the preparation of myrmicarin alkaloids is described. Key transformations in this convergent approach include a stereospecific palladium-catalyzed N-vinylation of a ...
Movassaghi, Mohammad, Ondrus, Alison E.
core   +2 more sources

Quality properties Of Vietnamese cocoa liquors [PDF]

open access: yes, 2013
Vietnam (VN) is an emerging country targeting cocoa as a potential industrial domain. It is however still unclear how the quality of VN cocoa liquors can be positioned in the world cocoa supply.
Dewettinck, Koen   +6 more
core  

Highly efficient and thermally stable NLO organic materials based on pyrrole and thiophene heterocycles [PDF]

open access: yes, 2011
A series of novel donor-acceptor chromophores designed to have good second order nonlinear optical responses has been synthesized and characterized. This series of compounds was designed to explore the consequence of using different electron accepting ...
Belsley, M.   +3 more
core   +1 more source

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