Results 11 to 20 of about 18,411 (287)

Marine Pyrrole Alkaloids [PDF]

open access: yesMarine Drugs, 2021
Nitrogen heterocycles are essential parts of the chemical machinery of life and often reveal intriguing structures. They are not only widespread in terrestrial habitats but can also frequently be found as natural products in the marine environment.
Kevin Seipp, Leander Geske, Till Opatz
doaj   +3 more sources

Regioselective Stepwise Synthesis of Unsymmetrical 1,2,5-Triarylpyrroles via Palladium-Catalyzed Decarboxylative Cross-Coupling and C–H Arylation [PDF]

open access: yesMolecules
Pyrrole derivatives are natural organic molecules that are important to the pharmaceutical industry due to their occurrence in nature and their use in a wide range of medical applications. In general, non-symmetric, 1,2,5-triaryl-substituted pyrroles are
Cindy Buonomano   +6 more
doaj   +2 more sources

Recent advances in the syntheses of pyrroles

open access: yesGreen Synthesis and Catalysis, 2023
The pyrrole moiety is an important structural motif in functional materials, natural products, and pharmaceuticals. More and more synthetic strategies toward pyrroles have emerged, where various efficient building blocks are developed and these synthons ...
Tao Shi   +7 more
doaj   +1 more source

Fused Pyrroles in Cholestane and Norcholestane Side Chains: Acaricidal and Plant Growth-Promoting Effects

open access: yesMolecules, 2022
Herein, we describe the synthesis and characterization of fused pyrroles in cholestane and norcholestane side chains derived from kryptogenin and diosgenin, respectively.
María G. De los Santos   +7 more
doaj   +1 more source

A green protocol for the synthesis of N-aryl pyrroles: A modified Clauson-Kaas approach using zinc catalyst

open access: yesResults in Chemistry, 2022
The first zinc-catalyzed simple and convenient protocol for the synthesis of N-substituted pyrroles through a modified Clauson-Kaas reaction without co-catalyst, ligand, base and solvent has been described.
C.M.A. Afsina, K.R. Rohit, G. Anilkumar
doaj   +1 more source

An Easy Synthesis of Monofluorinated Derivatives of Pyrroles from β-Fluoro-β-Nitrostyrenes

open access: yesMolecules, 2021
The catalyst-free conjugate addition of pyrroles to β-Fluoro-β-nitrostyrenes was investigated. The reaction was found to proceed under solvent-free conditions to form 2-(2-Fluoro-2-nitro-1-arylethyl)-1H-pyrroles.
Alexander S. Aldoshin   +3 more
doaj   +1 more source

Red-to-NIR Emissive Radical Cations Derived from Simple Pyrroles for Bio-Imaging [PDF]

open access: yes, 2021
Red-to-near-infrared (NIR) fluorophores are highly desirable for bio-imaging with advantages of excellent tissue penetration ability and less interference from auto-fluorescence, but their synthesis usually require tedious procedures and it’s thus highly
Ben Zhong, Tang   +5 more
core   +2 more sources

Diabetes mellitus is associated with elevated urinary pyrrole markers of γ-diketones known to cause axonal neuropathy

open access: yesBMJ Open Diabetes Research & Care, 2020
Introduction Progressive distal symmetrical axonal neuropathy, a complication of diabetes mellitus (DM), has an unknown cause. Normal physiological metabolism and diabetic dysmetabolism are associated with the generation of γ-diketones.
Wenting Feng   +3 more
doaj   +1 more source

Synthesis of N-perfluoroalkyl-3,4-disubstituted pyrroles by rhodium-catalyzed transannulation of N-fluoroalkyl-1,2,3-triazoles with terminal alkynes

open access: yesBeilstein Journal of Organic Chemistry, 2021
The rhodium-catalyzed transannulation of N-perfluoroalkyl-1,2,3-triazoles with aromatic and aliphatic terminal alkynes under microwave heating conditions afforded N-perfluoroalkyl-3,4-disubstituted pyrroles (major products) and N-fluoroalkyl-2,4 ...
Olga Bakhanovich   +3 more
doaj   +1 more source

Metal-Free Catalyzed Oxidation/Decarboxylative [3+2] Cycloaddition Sequences of 3-Formylchromones to Access Pyrroles with Anti-Cancer Activity

open access: yesMolecules, 2023
An efficient and direct approach to pyrroles was successfully developed by employing 3-formylchromones as decarboxylative coupling partners, and facilitated by microwave irradiation.
Xue Li   +6 more
doaj   +1 more source

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