Results 31 to 40 of about 105,049 (336)

‐ and Calix[12]pyrrole Analogues [PDF]

open access: yes, 2023
Chiral pyrrolic macrocycles continue to attract interest. However, their molecular design remains challenging. Here, we report a calixpyrrole-based chiral macrocyclic system, calix[1]furan[1]pyrrole[1]thiophene (1), synthesized from an oligoketone ...
Yasuhide Inokuma   +19 more
core   +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

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

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

Intermolecular (pyrrole)N-H...π(pyrrole) interactions in bis(2-pyrrolyl)methylferrocene, an organometallic porphyrin precursor [PDF]

open access: yes, 1999
The title compound, C₁₉H₁₈FeN₂ or [Fe(C₅H₅)(C₁₄H₁₃- N₂)], crystallizes in space group P2₁ln with two molecules in the asymmetric unit. The pyrrole groups take part in intermolecular (pyrrole)N--H...π(pyrrole) interactions through a hydrogen-bonded ...
Gallagher, John F., Moriarty, Elena
core   +2 more sources

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

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

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

Pyrrole-Terminated Diaminobutane (DAB) Dendrimer Monolayers on Gold:  Oligomerization of Peripheral Groups and Adhesion Promotion of Poly(pyrrole) Films†

open access: yes, 2016
Pyrrole-Terminated Diaminobutane (DAB) Dendrimer Monolayers on Gold:  Oligomerization of Peripheral Groups and Adhesion Promotion of Poly(pyrrole) Films†
Robin L. McCarley (57433)   +1 more
core   +1 more source

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