Results 1 to 10 of about 2,046 (100)

Modeling Pyran Formation in the Molybdenum Cofactor: Protonation of Quinoxalyl–Dithiolene Promoting Pyran Cyclization [PDF]

Inorganic Chemistry, 2019
Mononuclear Mo and W enzymes require a unique ligand known as molybdopterin (MPT). This ligand binds the metal through a dithiolene chelate, and the dithiolene bridges a reduced pyranopterin group. Pyran scission and formation have been proposed as a reaction of the MPT ligand that may occur within the enzymes to adjust reactivity at the Mo atom.
Douglas R. Gisewhite, Alexandra L. Nagelski, Daniel C. Cummins, Glenn P. A. Yap, Sharon J. N. Burgmayer   +4 more
openaire   +2 more sources

Synthesis of Polyfunctionalized 4H‐Pyrans [PDF]

Journal of Chemistry, 2012
Amberlyst A21 catalyzed one‐pot three‐component coupling of aldehyde and malononitrile with active methylene compounds such as acetylacetone and ethyl acetoacetate for the synthesis of pharmaceutically important polyfunctionalized 4H‐pyrans has been reported. Simple experimental procedure, no chromatographic purification, no hazardous organic solvents,
Manisha Bihani, Pranjal P. Bora, Ghanashyam Bez   +2 more
openaire   +2 more sources

Graphene oxide supported ionic liquid/Fe complex: a robust and highly stable nanocatalyst. [PDF]

RSC Adv, 2023
Taheri K, Elhamifar D, Kargar S, Zarnegaryan A.   +3 more
europepmc   +1 more source

Pyran Polymer [PDF]

, 2020
openaire   +1 more source

Magnetic resorcinol-formaldehyde supported Schiff-base/Cu as a robust and recoverable nanocatalyst for the synthesis of tetrahydrobenzo[<i>b</i>]pyrans. [PDF]

Nanoscale Adv
Bazmayon P, Elhamifar D, Kargar S.
europepmc   +1 more source

Rh(III)-Catalyzed Regioselective [4 + 2] Annulation of 2-Benzyl-2H-indazole-6-carboxylic Acids with Ynamides to Access Indazole-Fused Pyrans. [PDF]

J Org Chem
Hsieh HS, Liu KM, Chao CM, Barve IJ, Sun CM.   +4 more
europepmc   +1 more source

Solvent-free mechanochemical multicomponent preparation of 4H-pyrans catalyzed by Cu₂(NH₂-BDC)₂(DABCO) metal-organic framework. [PDF]

Heliyon, 2023
Akhlaghi Z, Naimi-Jamal MR, Panahi L, Dekamin MG, Farasati Far B.   +4 more
europepmc   +1 more source

Design and catalytic performance of a novel two-dimensional copper metal-organic framework for green synthesis of tetrahydrobenzo[b]pyrans. [PDF]

Sci Rep
Bahaderani EJ, Mohammadi K, Hayati P, Janczak J.   +3 more
europepmc   +1 more source

Copper immobilized MIL-125-NH₂ as an efficient nanocatalyst for click reaction and synthesis of benzo[b]pyrans. [PDF]

Sci Rep
Sadati Z, Alinezhad H, Tajbakhsh M.
europepmc   +1 more source

Zr-MOF-glutaraldehyde-Adn@Fe₃O₄ nanocomposite: as a new adsorbent for removal of methylene blue and heterogeneous nanocatalyst for the synthesis of tetrahydrobenzo[b]pyran derivatives. [PDF]

Sci Rep
Yazdiamiri F, Alinezhad H, Kiani A, Ghasemi S.   +3 more
europepmc   +1 more source