Results 101 to 110 of about 12,662 (287)

Organobase-catalyzed three-component reactions for the synthesis of 4H-2-aminopyrans, condensed pyrans and polysubstituted benzenes

Beilstein Journal of Organic Chemistry, 2014
Novel routes for the preparation of 2-amino-4H-pyran-3-carbonitrile 9, amino-arylbenzoic acid ester derivatives 13a,b, 2-aminotetrahydro-4H-chromene-3-carbonitrile 18, 3-amino-4-cyanotetrahydronaphthalene-2-carboxylic acid ester 26 and 4-amino-3,5 ...
Moustafa Sherief Moustafa, Saleh Mohammed Al-Mousawi, Maghraby Ali Selim, Ahmed Mohamed Mosallam, Mohamed Hilmy Elnagdi   +4 more
doaj   +1 more source

Electronic structure of tetraphenyldithiapyranylidene : A valence effective Hamiltonian theoretical investigation [PDF]

, 1991
We present a theoretical investigation of the electronic structure of tetraphenyldithiapyranylidene (DIPSΦ4) using the nonempirical valence effective Hamiltonian (VEH) method.
Ortí Guillén, Enrique, Viruela Martín, Pedro Manuel, Viruela Martín, Rafael   +2 more
core   +2 more sources

Fungal Polysaccharides as Next‐Generation Bioactive: Advances in Structure–Activity Mapping, Mode of Action, and Biotechnological Horizons

Food Frontiers, Volume 7, Issue 3, May 2026.
ABSTRACT Fungal polysaccharides (FPs) represent a diverse class of bioactive macromolecules widely studied for their nutritional, therapeutic, and biotechnological value. This review synthesizes recent advances (2020–2025) in the structural characterization, biological functions, and translational potential of FPs.
Muhammad Aaqil, Feng Zhang, Jingchuan Zheng, Muhammad Kamil, Yuwei Guo, Cunchao Zhao, Yang Tian   +6 more
wiley   +1 more source

Ruthenium-Based Heterocyclic Carbene-Coordinated Olefin Metathesis Catalysts [PDF]

, 2010
The fascinating story of olefin (or alkene) metathesis (eq 1) began almost five decades ago, when Anderson and Merckling reported the first carbon-carbon double-bond rearrangement reaction in the titanium-catalyzed polymerization of norbornene.
Grubbs, Robert H., Vougioukalakis, Georgios C.   +1 more
core   +1 more source

Gaining insights into MmpL3: combining structural and computational approaches to unlock transport and inhibitor‐binding mechanisms

Acta Crystallographica Section D, Volume 82, Issue 5, Page 550-570, May 2026.
This study investigates the mycobacterial membrane protein MmpL3, a key target for new antituberculosis drugs, by combining high‐resolution crystallography and computational simulations. It reveals how the inhibitor UPAR‐1109 binds to MmpL3, providing detailed insights into the function and flexibility of the protein and supporting the rational design ...
Satoshi Murakami, Domenico Marson, Eiki Yamashita, Bruno Broshka, Ui Okada, Maho Aoki, Giannamaria Annunziato, Erik Laurini, Emanuele Carosati, Marco Pieroni   +9 more
wiley   +1 more source

Part –V: Utilities of Active Methylene Compounds and Heterocycles Bearing Active Methyl or having an Active Methine in the Formation of Nitrogenous Heterocycles Having oxygen or sulfur atom

To Chemistry Journal, 2020
Most of the common and novel synthesized active methylene compounds as well as heterocycles bearing active methyl or having methine site were used in the syntheses of wide variety of five-, six- and seven-membered azaheterocyclic systems having oxygen or
Mohamed Abdel-Megid
doaj  

5-Ureido-3,3-diphenyl-3H-naphtho[2,1-b]pyrans: Photoswitchable self-assembling architectures

International Journal of Photoenergy, 2004
5-Ureido-3,3-diphenyl-3H-naphtho[2,1-b]pyrans have been synthesized and their photochromic properties have been quantified using UV-Visible spectroscopy.
X. Sallenave, S. Delbaere, S. Ahmed, G. Vermeersch, J. L. Pozzo   +4 more
doaj   +1 more source

Resistance to Bacterial Infection Induced by Statolon and Pyran [PDF]

, 1970
Frank F. Pindak
openalex   +1 more source

Heck-Type Coupling of Fused Bicyclic Vinylcyclopropanes: Synthesis of 1,2-Dihydropyridines, 2,3-Dihydro-1H-Azepines, 1,4-Cyclohexadienes, 2H-Pyrans, and 1,3-Butadienes

, 2021
Nikolai Wurzer, Urszula Klimczak, Tobias Babl, Sebastian Fischer, Ricardo A. Angnes, Julia Rehbein, Oliver Reiser   +6 more
openalex   +1 more source

Ultrasound‐Assisted DES Extraction of Black Rice Anthocyanins: Optimization, Characterization, and Bioactivity

Journal of Food Science, Volume 91, Issue 5, May 2026.
ABSTRACT Black rice is a rich source of anthocyanins, which exhibit strong antioxidant properties and potential hypoglycemic effects. However, the application of black rice and related bioactive compounds in the food and functional food industries is limited by low extraction yields.
Cuiqin li, Yabin Shi, Ziming Cao, Fengliang Liu   +3 more
wiley   +1 more source