Results 31 to 40 of about 92,883 (234)
Molecules, 2012 Spiro-N,N-ketal 5, consisting of a phthaloperine heterocyclic ring and a naphtha[1,8-ef][1,4]diazepine ring, was obtained along with spiro-N,N-ketal 2 via 2,2-condensation in the reaction of ninhydrin with naphthalene-1,8-diamine.
Keiji Kobayashi +4 more
doaj +1 more source
Photochemistry of N-(selenoalkyl)-phthalimides. Formation of N, Se-heterocyclic systems [PDF]
, 2015 A variety of N-(selenomethyl)alkyl-phthalimides (alkyl = -(CH2)n-; n = 2-5, 1a, b, d, e) and N-(selenobenzyl)propyl phthalimide (1c) were synthesized and their photochemistry was studied at λ = 300 nm.
Argüello, Juan Elias +3 more
core +1 more source
A user-friendly Matlab program and GUI for the pseudorotation analysis of saturated five-membered ring systems based on scalar coupling constants [PDF]
, 2008 Background: The advent of combinatorial chemistry has revived the interest in five-membered heterocyclic rings as scaffolds in pharmaceutical research. They are also the target of modifications in nucleic acid chemistry.
Hendrickx, Pieter, Martins, José
core +4 more sources
Zanco Journal of Pure and Applied Sciences, 2020 The present study deals with the synthesis, spectroscopic characterization, antibacterial and antifungal activities of novel series five-membered ring heterocyclic compounds containing nitrogen and sulfur heteroatoms.
Trifa Khalaf Mohammed +2 more
doaj +3 more sources
Crystal structures of two 6-(2-hydroxybenzoyl)-5H-thiazolo[3,2-a]pyrimidin-5-ones
Acta Crystallographica Section E: Crystallographic Communications, 2015 The title compounds, 6-(2-hydroxybenzyl)-5H-thiazolo[3,2-a]pyrimidin-5-one, C13H8N2O3S, (1), and 6-(2-hydroxybenzyl)-3-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one, C14H10N2O3S, (2), were synthesized when a chromone-3-carboxylic acid, activated with ...
Ligia R. Gomes +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.3D porous carbons with tunable density are crucial for energy storage, separations, and load‐bearing applications; however, their fabrication is often constrained by shrinkage during pyrolysis. This study optimizes and demonstrates the versatility of a template–coating pair strategy, producing materials that largely retain their shape and hierarchical ...
Adarsh Suresh +7 more
wiley +1 more source
Synthesis and Biological Evaluation of Novel 5,7-Dichloro-1,3-benzoxazole Derivatives
Journal of Chemistry, 2013 A new class of 5,7-dichloro-1,3-benzoxazole derivatives 4–11 were synthesized by fusing 5,7-dichloro-2-hydrazino-1,3-benzoxazole 3 nucleus with aliphatic acids, active methylene compounds, and with selected esters to form heterocyclic ring systems like 1,
N. D. Jayanna +5 more
doaj +1 more source
Types and properties of metal-free catalysts for living polymerizations of biomaterials [PDF]
, 2008 Syntéza biokompatibilních a biodegradabilních polyesterů, použitelných převážně v medicíně, využívá pro polymeraci za otevření kruhu katalyzátory na bázi kovu (např. Sn, Al atd.), které se mohou po implantaci deponovat v těle.
Repka, Martin
core
O-H...O, C-H...O and C-H...[pi]arene intermolecular interactions in (2S)-2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)pentanoic acid and (2S)-3-methyl-2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)butanoic acid [PDF]
, 2000 In the first of the title compounds, (2S)-2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)pentanoic acid, C₁₃H₁₅NO₃, prepared from L-norvaline, a hydrogen-bonded network is formed in the solid state through O-H...O=C, C-H...O=C and C-H...πarene intermolecular ...
Brady, Fiona, Gallagher, John F.
core +1 more source
Advanced Functional Materials, EarlyView.In this research, it is demonstrated that dual nitrogen and sulfur doping in hollow carbon spheres creates a tunable coordination environment that stabilizes cationic Pd single atoms as robust organometallic complexes, enabling high selectivity and stability for electrochemical hydrogen peroxide production under harsh acidic and peroxide‐rich ...
Guilherme V. Fortunato +16 more
wiley +1 more source