Results 31 to 40 of about 57,050 (287)

SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION OF HYBRID MAGNETIC NANOPARTICLES, BASED ON FE@AU AND PYRROLE

open access: yesStudia Universitatis Babes-Bolyai Chemia, 2017
The synthesis and characterization of Fe@Au and Fe@Au covered with pyrrole and pyrrole functionalized with N-succinimide is presented. The synthesis of Fe@Au nanoparticles, with diameters between 5 -7 nm was performed by the reverse micelles method. The
Maria-Loredana SORAN   +4 more
doaj   +1 more source

Free-radical cyclization approach to polyheterocycles containing pyrrole and pyridine rings

open access: yesBeilstein Journal of Organic Chemistry, 2021
A wide range of derivatives with new pyrido[2,1-a]pyrrolo[3,4-c]isoquinoline skeleton was synthesized by free-radical intramolecular cyclization of o-bromophenyl-substituted pyrrolylpyridinium salts using the (TMS)3SiH/AIBN system.
Ivan P. Mosiagin   +5 more
doaj   +1 more source

Rate Dependence on Inductive and Resonance Effects for the Organocatalyzed Enantioselective Conjugate Addition of Alkenyl and Alkynyl Boronic Acids to β-Indolyl Enones and β-Pyrrolyl Enones

open access: yesMolecules, 2021
Two key factors bear on reaction rates for the conjugate addition of alkenyl boronic acids to heteroaryl-appended enones: the proximity of inductively electron-withdrawing heteroatoms to the site of bond formation and the resonance contribution of ...
Amy Boylan   +6 more
doaj   +1 more source

4,5,6,7-Tetrahydroindol-4-Ones as a Valuable Starting Point for the Synthesis of Polyheterocyclic Structures

open access: yesMolecules, 2021
This review focuses on the synthesis of polyheterocyclic structures with a variety of medicinal and optoelectronic applications, starting from readily available 4,5,6,7-tetrahydroindol-4-one analogs. First, routes toward the 4,5,6,7-tetrahydroindol-4-one
Tomas Horsten, Wim Dehaen
doaj   +1 more source

{2,2′-[3-Azapentane-1,5-diylbis(nitrilomethylidyne)]dipyrrol-1-yl}(4-methylpyridine)cobalt(III) tetraphenylborate

open access: yesActa Crystallographica Section E, 2010
The title compound, [Co(C14H17N5)(C6H7N)](C24H20B) or [Co{(pyrrole)2dien}(4-Mepy)]BPh4 where (pyrrole)2dien is 2,2′-[(3-azapentane-1,5-diylbis(nitrilomethylidyne)]dipyrrole and 4-Mepy is 4-methylpyridine, contains a pentadentate (pyrrole)2dien ...
Mahmood Karimi Abdolmaleki   +3 more
doaj   +1 more source

Scientific Opinion on Flavouring Group Evaluation 77, Revision 1 (FGE.77Rev1): Consideration of Pyridine, Pyrrole and Quinoline Derivatives evaluated by JECFA (63rd meeting) structurally related to Pyridine, Pyrrole, Indole and Quinoline Derivatives evaluated by EFSA in FGE.24Rev2 (2013) [PDF]

open access: yesEFSA Journal, 2014
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to consider evaluations of flavouring substances assessed since 2000 by the Joint FAO/WHO Expert Committee on Food Additives
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source

Postdiagenetic Bacterial Transformation of Nickel and Vanadyl Sedimentary Porphyrins of Organic-Rich Shale Rock (Fore-Sudetic Monocline, Poland)

open access: yesFrontiers in Microbiology, 2021
Nickel and vanadyl porphyrins belong to the so-called fossil geo- or sedimentary porphyrins. They occur in different types of organic matter-rich sediments but mostly occur in crude oils and their source rocks, oil shales, coals, and oil sands.
Robert Stasiuk, Renata Matlakowska
doaj   +1 more source

Synthesis of novel pyrroles and fused pyrroles as antifungal and antibacterial agents [PDF]

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 compound structures were confirmed by spectroscopic analysis.
Rania Helmy Abd El-Hameed   +5 more
openaire   +3 more sources

Dibromopyrrole Alkaloids from the Marine Sponge sp

open access: yesNatural Product Communications, 2009
Fourteen dibromopyrrole alkaloids were isolated from the marine sponge Acanthostylotella sp. collected in Indonesia. In addition to the known compounds 4,5-dibromo-N-(methoxy-methyl)-1 H -pyrrole-2-carboxamide ( 7 ), 4,5-dibromo-1 H -pyrrole-2 ...
Sherif Saeed Ebada   +4 more
doaj   +1 more source

Pyrrole-Based Conjugated Microporous Polymers as Efficient Heterogeneous Catalysts for Knoevenagel Condensation

open access: yesFrontiers in Chemistry, 2021
Conjugated microporous polymers (CMPs) with robust architectures, facilely tunable pore sizes and large specific surface areas have emerged as an important class of porous materials due to their demonstrated prospects in various fields, e.g.
Ruidong Gao   +5 more
doaj   +1 more source

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