dipolar cycloaddition
Enhanced Nonlinear Absorption Performance of Reduced Graphene Oxide Nanohybrid Covalently Functionalized by Porphyrin via 1,3 Dipolar Cycloaddition
... 1,3-dipolar cycloaddition reaction and characterized by Fourier transform infrared spectroscopy, Raman, ultraviolet/visible absorption, fluorescence, and transmission electron ...
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Synthesis of pyrrolo[1,2-a]quinolines by formal 1,3-dipolar cycloaddition reactions of quinolinium salts
... of dipolar cycloaddition reactions involving quinolinium salts that have been reported in the literature involve ketones as electron-withdrawing groups to stabilise the intermediate ylide [39-49]; for ...
5
An efficient one pot synthesis of C2 symmetric pyrrolidines and dispiro pyrrolidines/pyrrolizidines through 1,3 dipolar cycloaddition reaction
... 1,3-Dipolar cycloaddition reactions are efficient methods for the construction of heterocyclic units in a highly regio- and stereoselective manner ...
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PEG MEDIATED ONE POT SYNTHESIS OF 1,2,3 BISTRIAZOLE DERIVATIVES BY 1,3 DIPOLAR CYCLOADDITION REACTION AND THEIR BIOLOGICAL EVALUATION
... A series of 1,2,3-bistriazole derivatives 4a-i were synthesized by the treatment of 1, 3 dibromopropane with sodium azide and substituted alkynes by 1,3-dipolar cycloaddition reaction. Solvent PEG-400 is ...
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Synthesis of 1,2,3-Triazole 5-Chloroisatin Derivatives via Copper-Catalyzed 1,3-Dipolar Cycloaddition Reactions
... As one of the best click reactions to date, the copper- catalyzed azide-alkyne cycloaddition features an enormous rate acceleration of 107 to 108 compared to the uncatalyzed 1,3-dipolar ...
5
Regioselective synthesis of sugar fused dispiropyrrolizidines via intermolecular 1,3 dipolar cycloaddition reaction
... the cycloaddition reaction of azomethine ylide generated in situ by the decarboxylative condensation of ninhydrin 4/ isatin 7/ acenaphthequinone 9 and proline 5 with dipolarophile 3 in refluxing toluene, which led ...
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A facile and regioselective synthesis of Spiro pyrrolidines and pyrrolizines through 1, 3 dipolar cycloaddition protocol
... 1,3-dipolar cycloaddition reaction with chalcones to give a single cycloadduct , in a one pot three component process as evidenced by thin layer chromatography (TLC) and spectral ...
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Alkaloid inspired spirocyclic oxindoles from 1,3 dipolar cycloaddition of pyridinium ylides
... Target spiroindolizidineoxindole structures may be e ffi cien- tly accessed by 1,3-dipolar cycloaddition of 3-alkylideneindo- line-2-ones. 5 Serov et al. described reactions between N-phenylacyl- quinolinium ...
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Ab initio Studies of Molozonide Formation in 1,3-Dipolar Cycloaddition Reactions Between C7-C10 Membered Simple Cycloalkynes and O3
... Huisgen’s reaction of alkynes with Ozone (O 3 ), at its first step yielding carboxylic acids functional groups is, undoubtedly, an example of 1,3-dipolar cycloaddition reactions. Cycloadditions of ...
9
A new reversible 1,3 dipolar cycloaddition and its application in dynamic covalent chemistry
... The first example of replication-based selection of library members in DCC was published 85 by Sadownik and Philp in 2008. The DCL was constructed from four building blocks; two aldehydes 69 and 70, of which 69 bears an ...
186
A Facile Regioselective 1,3-dipolar Cycloaddition Protocol for the Synthesis of Thiophene containing Spiro Heterocycles
... 3 dipolar cycloaddition chemistry; ...1,3-Dipolar cycloaddition of arynes with azomethine imines: synthesis of 1,2- dihydropyrazolo[1,2-a]indazol-3(9H)-ones, Tetrahedron ...
9
Synthesis and characterization of some new Benzotriazole derivatives via 1,3-dipolar cycloaddition reactions
... 1,3-dipolar cycloaddition reactions with some of α,β-unsaturated carbonyl compounds like [chalcones (ch 1 -ch 6 ) , Acryl amide, Methyl acrylate, Cinnamic acid,1,4-Benzoquinone and Maleic ...
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Regiochemical and Stereochemical Studies of the Intramolecular Dipolar Cycloaddition of Nitrones Derived from Quaternary Aldehydes
... To test the cycloaddition to give a cyclohexane ring system, we prepared the aldehyde 10 from the same ester 3 (Scheme 3). This followed related chemistry but by using the homologous 5-bromo-1-pentene. Heating the ...
5
Synthesis, Characterization and 1, 3-Dipolar Cycloaddition of Novel Sugar- Derived Nitrones with N-Arylmaleimides
... 1,3-dipolar cycloaddition to olefins and ...1,3-dipolar cycloaddition reaction between a nitrone and an olefin gives the isoxazolidine ...1,3-dipolar cycloaddition of nitrone 6 ...
8
Reactive Energetic Plasticizers Utilizing Cu-Free Azide-alkyne 1,3-dipolar Cycloaddition for In-Situ Preparation of Poly(THF-co-GAP)-Based Polyurethane Energetic Binders
... Abstract: Reactive energetic plasticizers (REPs) coupled with hydroxy-telechelic poly(glycidyl azide-co-tetrahydrofuran) (PGT)-based energetic polyurethane (PU) binders for use in solid propellants and plastic-bonded ...
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Synthesis and Characterization of Some New Nucleoside Analogues from Substituted Benzimidazole via 1,3-Dipolar cycloaddition Thanaa M. Al-Mouamin | Ahmed Kh. Kadhim
... 1,3-dipolar cycloaddition reaction with N-substuted compounds afforded bloked nucleoside analoges (13-16), which after hydrolysis gave our target the free nucleoside analogues ...
9
Regioselectivie Synthesis of New Spiro-Oxindolopyrrolidines via a Three-Component Asymmetric 1,3-Dipolar Cycloaddition Reaction of Azomethine Ylides aAnd Chiral Menthyl Cinnamate
... facts and in continuation of our previous work on the synthesis of spirooxindoles [9], herein, we report a facile synthesis of a small library of novel spirooxindolopyrrolidines 4 with the help of menthol as a chiral ...
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1,3-dipolar cycloaddition reactions in aqueous media and investigations into solid phase ether synthesis
... When aqueous sodium hypochlorite was added to oxime 231 in water alone it was clearly observable from ‘H NMR spectral analysis that no intramolecular nitrile oxide 1,3-dipolar cycloaddition had occurred ...
254
Cascade oxime formation, cyclization to a nitrone, and intermolecular dipolar cycloaddition.
... Simple haloaldehydes, including enolisable aldehydes, were found to be suitable for the formation of cyclic products by cascade (domino) condensation, cyclisation, dipolar cycloaddition chemistry. This ...
10
Methyl () (1α,2β,8α,9α,10β) 2 chloro 4 aza 3 oxatetracyclo[8 4 0 02,9 04,8]tetradecane 9 carboxylate oxalic acid monohydrate
... The tetracyclic title compound, (III), was obtained upon an attempted 1,3-dipolar cycloaddition of 3,4-dihydro-2H- pyrrole 1-oxide, (I), to methyl 2-chloro-2-(bicyclo[4.1.0]hept-7-ylidene)acetate, (II) ...
9