, 1991 Phenyl- and naphthyl-dioxolanes are stereoselectively isomerised using titanium tetrachloride in methylene dichloride at -78°C into benzo- and naphtho ...
Lee Son, V.R. +5 more
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A Domino Strategy for the Synthesis of 2H‐Pyrans from Propargyl Vinyl Ethers
, 2019 Stable monocyclic 2H‐pyrans are synthesized from readily available tertiary propargyl vinyl ethers via a metal‐free all‐pericyclic domino manifold involving a sequential propargyl Claisen rearrangement/[1,3]H‐shift/oxa‐6π electrocyclization set of ...
Delgado-Hernández, Samuel +4 more
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Synthesis of novel substituted tetrahydropyridines, pyrans and thiopyrans
, 2004 2459-2463A new class of six membered heterocycles, 4,4-disubstituted 2,6-diaryl-3,5-diaroyl tetrahydropyridines/pyrans/thiopyrans are synthesized from 1,5-diaryl-3,3 dimethoxycarbonyl-1,5-pentanedione 1/1,5 -diaryl-3-cyano-3-ethoxycarbonyl-1,5 ...
Padmavathi, V +3 more
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A Green, Facile, and Efficient Synthesis of 4H-Benzo[b]pyrans Using 2,2’-Bipyridine as a Recyclable ...
Farhad Shirini (703231) +3 more
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A new copper complex of 1-(1<i>H</i>-benzo[<i>d</i>]imidazol-2-yl)guanidine on magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles as a green, reusable, robust and homoselective nanocatalyst in the synthesis of tetrahydrobenzo[<i>b</i>]pyrans. [PDF]
RSC AdvTahmasbi B +3 more
europepmc +1 more source
Metalation of Pyrans and Dihydropyridines : When is an 8pi-System Cost Effective ?
The pyrans I (R = Me, H; R1 = H) with BuLi/KOCMe3 or KSiMe3 gave the 2-metalated derivs. I (R1 = K), which reacted with alkyl halides to give I (R = H, Me; R1 = Me, Et, SiMe3, CH2SiMe3); thus the behavior the 4H-pyrans toward organometallic reagents is ...
Schneider, Philippe, Schlosser, Manfred
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Robust Mixed-Ligand Ni(II)-framework With Pore-Engineered Lewis Acid-Base Sites for Size-selective and One-Pot Mild Synthesis of Bioactive 4H-Pyrans. [PDF]
Chem Asian JChand R, Maji B, Mondal PP, Neogi S.
europepmc +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 AdvBazmayon P, Elhamifar D, Kargar S.
europepmc +1 more source
Synthesis and photochromic properties of tri- and tetra-aryl-3H-naphtho[2,1-b]pyrans
, 2011 The objective of this study was to investigate the influence of 6-aryl-, 5-aryl- and 5,6-diaryl- substituents upon the photochromic properties [A-max and fading kinetics (tv,)] of 3,3-diaryl-3H- naphtho[2,1-b]pyrans.
Kershaw, Christopher Stephen
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