882525-58-8Relevant academic research and scientific papers
Potassium-Exchanged Zirconium Hydrogen Phosphate [α-Zr(KPO4)2]-Catalyzed Synthesis of 2-Amino-4 H -pyran Derivatives under Solvent-Free Conditions
Rosati, Ornelio,Pelosi, Azzurra,Temperini, Andrea,Pace, Vittorio,Curini, Massimo
, p. 1533 - 1540 (2016)
A high-yielding, one-pot, three-component synthesis of functionalized 2-amino-4H-pyrans from β-dicarbonyl compounds, activated cyanomethylene compounds, and aldehydes, mediated by potassium-exchanged zirconium hydrogen phosphate [α-Zr(KPO4)2], is reported. The protocol shows excellent versatility, as it can be applied to aromatic, aliphatic, or α,β-unsaturated aldehydes under solvent-free conditions.
A simple synthesis of magnetic nanoparticles-supported 4-aminomethylbenzoic acid as a highly efficient and reusable catalyst for synthesis of 2-amino-4H-chromene derivatives
Khodaei, Mohammad Mehdi,Alizadeh, Abdolhamid,Haghipour, Maryam
, p. 1033 - 1045 (2017/10/06)
A new 4-aminomethylbenzoic acid-functionalized Fe3O4 magnetic nanoparticles as a hybrid heterogeneous catalyst was synthesised and characterized by FT-IR, XRD, TGA, TEM, SEM and VSM techniques. The catalytic activity of this nanocata
Nanozeolite clinoptilolite as a highly efficient heterogeneous catalyst for the synthesis of various 2-amino-4H-chromene derivatives in aqueous media
Baghbanian, Seyed Meysam,Rezaei, Niloufar,Tashakkorian, Hamed
, p. 3446 - 3458 (2013/12/04)
The preparation of pharmaceutically active 2-amino-4H-chromene derivatives has been achieved using a nano powder of natural clinoptilolite (CP) zeolite. A wide range of these worthy structures having diverse substituents on the 4H-chromene ring were effic
A facile solvent-free one-pot three-component method for the synthesis of 2-amino-4H-pyrans and tetrahydro-4H-chromenes at ambient temperature
Amirnejad, Meysam,Naimi-Jamal, Mohammad Reza,Tourani, Hesam,Ghafuri, Hossein
, p. 1219 - 1225 (2013/08/23)
2-Amino-4H-pyrans and tetrahydro-4H-chromenes were readily prepared via a one-pot, three-component reaction of an aldehyde, malononitrile, and ethyl acetoacetate or 5,5-dimethyl-1,3-cyclohexanedione in the presence of anhydrous piperazine as an efficient
A facile and efficient synthesis of 2-amino-3-cyano-4H-chromenes and tetrahydrobenzo[b]pyrans using 2,2,2-trifluoroethanol as a metal-free and reusable medium
Khaksar, Samad,Rouhollahpour, Ahmad,Talesh, Saeed Mohammadzadeh
experimental part, p. 11 - 15 (2012/09/21)
A highly efficient one-pot three-component regioselective synthesis of 2-amino-3-cyano-4H-chromene and tetrahydrobenzo[b]pyran derivatives has been developed by annulation of aldehydes, malononitrile, and resorcinol or dimedone under reflux conditions in
A revisit to the hantzsch reaction: Unexpected formation of tetrahydro-benzo[ b ]pyrans beyond polyhydroquinolines
Undale, Kedar A.,Park, Yoonkook,Park, Kyungmoon,Dagade, Dilip H.,Pore, Dattaprasad M.
experimental part, p. 791 - 796 (2011/06/21)
A competitive multicomponent synthesis of tetrahydrobenzo[b]pyrans over polyhydroquinolines is achieved in the presence of ammonium acetate at ambient temperature in ethanol medium. The formation of tetrahydrobenzo[b]pyran instead of polyhydroquinoline in
