Results 31 to 40 of about 136 (108)
ChemistrySelect, Volume 10, Issue 37, October 6, 2025.Equilibrium constants for a series of substituted benzopyranamines were determined. The calculated free energies correlate with the steric size of the substituent and compare well with a previously reported series of benzofuranamines. X‐ray crystallographic data of examples from both series offers an understanding of the steric effects and lack of ...
Benjamin D. Cavilla +3 more
wiley +1 more source
Current Organocatalysis, 2019 Background: Recently, organic synthesis using ionic liquids (ILs) via green approach has attracted considerable attention to address the problem associated with environmental pollution. Magnetization of ILs provides added advantages of separation by external magnet.
Arijit Saha +4 more
openaire +1 more source
Synthesis of tetrahydrobenzo[b]pyran under catalysis of NH4Al(SO4)2·12H2O (Alum)
Arabian Journal of Chemistry, 2017 AbstractA simple and efficient one-pot synthesis of tetrahydrobenzo[b]pyrans from the three-component reaction between dimedone, aldehydes, and active methylene compounds using NH4Al(SO4)2·12H2O (Alum) as a catalyst at 80°C is described. The catalyst exhibits remarkable reactivity and is reusable.
Mohammadi, Ali A. +2 more
openaire +1 more source
Comptes Rendus. Chimie, 2011 A new functionalized basic ionic liquid, 4-amino-1-(2,3-dihydroxy propyl) pyridinium hydroxide [ADPPY] [OH], has been introduced as a catalyst for the synthesis of tetrahydrobenzo[ b ]pyrans under mild conditions.
P.P. Salvi +5 more
openaire +1 more source
Comptes Rendus. Chimie, 2012 Phenylboronic acid, a non-toxic compound, is used as catalyst for an efficient, rapid, and one-pot three-component synthesis of tetrahydrobenzo[ b ]pyrans in good to excellent yields. This new procedure has the advantages of operational simplicity, shorter reaction time, higher yields and ...
Nemouchi, Sara +3 more
openaire +1 more source
NANOCATALYST-MEDIATED TETRAHYDROBENZO[B]PYRANS: REVIEW SYNTHESIS OF A COMPREHENSIVE
Abstract: Tetrahydrobenzo[b]pyrans, a class of highly valuable heterocyclic compounds, have garnered substantial consideration due to their different medicinal properties and synthetic versatility. Their structural features make them promising candidates for drug development, agrochemicals, and materials science.
openaire +2 more sources
WELPSA: A natural catalyst of alkali and alkaline earth metals for the facile synthesis of tetrahydrobenzo[b]pyrans and pyrano[2,3-d]pyrimidinones as inhibitors of SARS-CoV-2. [PDF]
Appl Organomet Chem, 2022 Nesaragi AR +6 more
europepmc +1 more source
Bulletin of the Chemical Society of Ethiopia, 2018 A green, efficient and simple technique for the synthesize of tetrahydrobenzo[b]pyrans through one-pot three-component reaction of dimedone, aromatic aldehydes and malonitrile as active methylene compound using immobilization of Preyssler heteropoly acid on Ni0.5Zn0.5Fe2O4 magnetite nanoparticles (MNPs), coated with hydroxyapatite (HA) as a catalyst is
Javid, A., Moeinpour, F.
openaire +2 more sources
Graphene oxide supported ionic liquid/Fe complex: a robust and highly stable nanocatalyst. [PDF]
RSC Adv, 2023 Taheri K +3 more
europepmc +1 more source
Investigation of Eletrooxidation Reaction of Some Tetrahydrobenzo[b]pyran Derivatives
International Journal of Electrochemical Science, 2008 Lida Fotouhi +2 more
openaire +1 more source