Sulfonated chitosan encapsulated magnetically Fe3O4 nanoparticles as effective and reusable catalyst for ultrasound-promoted rapid, three-component synthesis of spiro-4H-pyrans
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the Iranian Chemical Society"
DOI: 10.1007/s13738-018-1399-7
Abstract: A facile one-pot protocol for synthesis of spiro-4H-pyrans using sulfonated chitosan-coated Fe3O4 nanoparticles (Fe3O4@CS-SO3H NPs) as an efficient catalyst under ultrasonic condition has been developed. First, the Fe3O4@CS NPs were prepared from the reaction of… read more here.
Keywords: sulfonated chitosan; fe3o4 nanoparticles; synthesis spiro; spiro pyrans ... See more keywords
Novel magnetic nanoparticle supported ionic liquid as an efficient catalyst for the synthesis of spiro [pyrazole-pyrazolo[3,4-b]pyridine]-dione derivatives under solvent free conditions
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Molecular Structure"
DOI: 10.1016/j.molstruc.2018.10.052
Abstract: Abstract A magnetically supported ionic liquid, guanidinium hydrogen sulfate on Fe3O4 nanoparticles, has been synthesized and evaluated as a recoverable and efficient catalyst for the one-pot synthesis of spiro [pyrazole-pyrazolo [3,4-b]pyridine]-dione derivatives via the reaction… read more here.
Keywords: catalyst; spectroscopy; efficient catalyst; synthesis spiro ... See more keywords
A facile one pot C-C and C-N bond formation for the synthesis of spiro-benzodiazepines and their cytotoxicity
Sign Up to like & getrecommendations! Published in 2017 at "Tetrahedron"
DOI: 10.1016/j.tet.2017.10.060
Abstract: Abstract An efficient, multicomponent and environmentally benign protocol has been developed for the synthesis of spiro-benzodiazepines through C C and C N bond formations in a single step. This one-pot protocol proceeds via three component… read more here.
Keywords: bond; spiro; spiro benzodiazepines; one pot ... See more keywords
Catalyst-free photocyclization for the synthesis of spiro-fused aromatic organic semiconductor based on SFX
Sign Up to like & getrecommendations! Published in 2018 at "Tetrahedron"
DOI: 10.1016/j.tet.2018.03.013
Abstract: Abstract A green protocol with catalyst-free photo-induced cyclization for the synthesis of a spiro-fused organic semiconductor molecule based on spiro[fluorene-9,9′-xanthene] (SFX) was developed. The photophysical and electrochemical properties of the spiro-fused compound (DPCzSFX) have been… read more here.
Keywords: catalyst free; synthesis spiro; spiro fused; organic semiconductor ... See more keywords
Synthesis of spiro[indolizidine-1,3′-oxindole] from l-glutamic acid
Sign Up to like & getrecommendations! Published in 2020 at "Tetrahedron"
DOI: 10.1016/j.tet.2020.131261
Abstract: Abstract Spiro[indolizidine-1,3′-oxindole] compounds have been synthesized in enantiomerically pure form from l -glutamic acid. The key oxidative ring contraction of chiral indolo[2,3-a]quinolizidinone was achieved by treatment with N-bromosuccinimide in tetrahydrofuran/water in the presence of catalytic… read more here.
Keywords: indolizidine oxindole; glutamic acid; spiro indolizidine; acid ... See more keywords
Isatins 3-C annulation vs ring-opening: Two different pathways for synthesis of spiro compounds via multicomponent reactions
Sign Up to like & getrecommendations! Published in 2019 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2019.151181
Abstract: Abstract An efficient synthesis of spiro compounds via two different pathways from the reactions of isatins, 3-phenylisoxazol-5(4H)-one (3-ethylisoxazol-5(4H)-one), and pyrazol-5-amine (6-aminopyrimidine-2,4(1H,3H)-dione) were reported. The catalyst Amberlyst-15 could be easy recycled and reused for many time… read more here.
Keywords: different pathways; spiro; spiro compounds; compounds via ... See more keywords
Prediction of the Synthesis of Spiro Derivatives by Double Intramolecular Aromatic Electrophilic Substitution Using Reactivity Indices
Sign Up to like & getrecommendations! Published in 2019 at "ACS Omega"
DOI: 10.1021/acsomega.8b03368
Abstract: The synthesis of heterocyclic spirobifluorene (SBF) analogs generally requires long and complicated synthetic pathways. Despite this synthetic effort, such structural modification allows the (opto)electronic properties of this remarkable three-dimensional node to be tuned especially for… read more here.
Keywords: synthesis; synthesis spiro; spiro derivatives; aromatic electrophilic ... See more keywords
Synthesis of spiro[2,3-dihydrofuran-3,3′-oxindole] derivatives via a multi-component cascade reaction of α-diazo esters, water, isatins and malononitrile/ethyl cyanoacetate
Sign Up to like & getrecommendations! Published in 2019 at "Green Chemistry"
DOI: 10.1039/c9gc01751h
Abstract: We report a green synthesis of spiro[2,3-dihydrofuran-3,3′-oxindole] derivatives which are of potential value in medicinal chemistry. read more here.
Keywords: oxindole derivatives; spiro dihydrofuran; synthesis spiro; dihydrofuran oxindole ... See more keywords
Synthesis of Spiro Barbiturates and Meldrum’s Acid Derivatives via a [2+2+2] Cyclotrimerization
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DOI: 10.1055/s-0037-1610238
Abstract: Intermolecular [2+2+2] cycloaddition of propargyl halides with 1,6-diynes was accomplished with a catalytic amount of Mo(CO)6 to generate benzyl halo barbiturates and Meldrum’s acid derivatives containing a spiro linkage. Furthermore, we have extended this methodology… read more here.
Keywords: meldrum acid; barbiturates meldrum; derivatives via; acid derivatives ... See more keywords
Cu(II)-β-cyclodextrin-catalyzed synthesis of spiro[indoline-3,4′-pyrano[3,2-c]chromene]-3′-carbonitrile derivatives
Sign Up to like & getrecommendations! Published in 2017 at "Synthetic Communications"
DOI: 10.1080/00397911.2017.1373822
Abstract: ABSTRACT Cu(II)-β-cyclodextrin-catalyzed synthesis of spiro[indoline-3,4′-pyrano[3,2-c]chromene]-3′-carbonitriles through the reaction of isatin derivatives, 4-hydroxycoumarin, and malononitrile in ethanol at room temperature. GRAPHICAL ABSTRACT read more here.
Keywords: indoline pyrano; spiro indoline; synthesis spiro; catalyzed synthesis ... See more keywords
One-Pot Synthesis of Spiro[chromeno[2,3-c]pyrazole-4,3′-indoline]-diones Using Sulfonic Acid Functionalized Nanoporous Silica SBA-Pr-SO3H and Study of Their Antimicrobial Properties
Sign Up to like & getrecommendations! Published in 2018 at "Polycyclic Aromatic Compounds"
DOI: 10.1080/10406638.2016.1154579
Abstract: ABSTRACT A novel and clean one-pot synthesis of spiro[chromeno[2,3-c]pyrazole-4,3′-indoline]-2′,5(6H)-diones via cyclocondensation reaction of isatins, 1,3-cyclohexadiones, and pyrazolone in aqueous media using SBA-Pr-SO3H (sulfonic acid-functionalized mesoporous silica) as an efficient heterogeneous solid acid catalyst was reported.… read more here.
Keywords: one pot; pot synthesis; pyrazole indoline; spiro chromeno ... See more keywords