Results 21 to 30 of about 200 (108)

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., Asghariganjeh, Mohammad R., Hadadzahmatkesh, Armin   +2 more
openaire   +1 more source

An efficient protocol for synthesis of tetrahydrobenzo[b]pyrans using amino functionalized ionic liquid

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, A.M. Mandhare, A.S. Sartape, D.K. Pawar, S.H. Han, S.S. Kolekar   +5 more
openaire   +1 more source

Phenylboronic acid as an efficient and convenient catalyst for a three-component synthesis of tetrahydrobenzo[b]pyrans

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, Boulcina, Raouf, Carboni, Bertrand, Debache, Abdelmadjid   +3 more
openaire   +1 more source

A new role for concentrated solar radiation (CSR) as a renewable heat source for the catalyst-solvent free synthesis of tetrahydrobenzo[b]pyran scaffolds. [PDF]

Sci Rep, 2023
Mohamadpour F.
europepmc   +1 more source

Preparation and catalytic application of two different nanocatalysts based on hexagonal mesoporous silica (HMS) in synthesis of tetrahydrobenzo[b]pyran and 1,4-dihydropyrano[2,3-c]pyrazole derivatives. [PDF]

Sci Rep, 2022
Abdolahi S, Gholamian F, Hajjami M.
europepmc   +1 more source

Fe₃O₄@nano-almondshell/Si(CH₂)₃/2-(1-piperazinyl)ethylamine as an effective magnetite almond shell-based nanocatalyst for the synthesis of dihydropyrano[3,2-c]chromene and tetrahydrobenzo[b]pyran derivatives. [PDF]

Sci Rep, 2023
Mallah D, Mirjalili BBF, Bamoniri A.
europepmc   +1 more source

Ni0.5Zn0.5Fe2O4@HA-PRS nanoparticle: A recoverable green catalyst for the synthesis of tetrahydrobenzo[b]pyrans in water

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

Methylene Blue as a Photo-Redox Catalyst: The Development Synthesis of Tetrahydrobenzo[b]pyran Scaffolds via a Single-Electron Transfer/Energy Transfer. [PDF]

Front Chem, 2022
Mohamadpour F.
europepmc   +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

Investigation of Eletrooxidation Reaction of Some Tetrahydrobenzo[b]pyran Derivatives

International Journal of Electrochemical Science, 2008
Lida Fotouhi, Azadeh Fatehi, Majid M. Heravi   +2 more
openaire   +1 more source