Results 71 to 80 of about 42,977 (261)

Supramolecular Chemistry in Metal–Organic Framework Materials

Advanced Materials, EarlyView.
This review highlights synergies between reticular chemistry and supramolecular chemistry. The role of supramolecular interactions in determining framework…guest interactions and attempts to understand dynamic behavior in metal–organic frameworks (MOFs), particularly emphasizing the development of crystal sponges, studying reactions in frameworks and ...
Eugenia Miguel‐Casañ, Georgia R. F. Orton, Danielle E. Schier, Neil R. Champness   +3 more
wiley   +1 more source

ChemInform Abstract: Studies on 1,3‐Dipolar Cycloadditions

ChemInform, 2002
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire   +2 more sources

Mechanistic DFT Study of 1,3-Dipolar Cycloadditions of Azides with Guanidine

Molecules, 2023
Density functional calculations SMD(chloroform)//B3LYP/6-311+G(2d,p) were employed in the computational study of 1,3-dipolar cycloadditions of azides with guanidine. The formation of two regioisomeric tetrazoles and their rearrangement to cyclic aziridines and open-chain guanidine products were modeled.
Ivana Antol, Zoran Glasovac, Davor Margetić   +2 more
openaire   +5 more sources

Redrawing the Mannich‐Type Reaction through Carbonyl Umpolung Reactivity

Advanced Synthesis &Catalysis, EarlyView.
GA: Herein, a conceptually novel one‐pot multicomponent strategy is reported for the streamlined construction of five‐membered imidazolidines from 1,2‐diaza‐1,3‐dienes (onefold), amines (twofold), and formaldehyde (twofold). This redesigned Mannich‐type reaction that exploits a carbene‐like activity of 1,2‐diaza‐1,3‐dienes (realized by “umpolung ...
Vittorio Ciccone, Sara Caselli, Giacomo Mari, Fabio Mantellini, Gianfranco Favi   +4 more
wiley   +1 more source

Copper(I)-Phosphinite Complexes in Click Cycloadditions: Three-Component Reactions and Preparation of 5-Iodotriazoles [PDF]

, 2016
© 2016 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.The remarkable activity displayed by copper(I)–phosphinite complexes of general formula [CuBr(L)] in two challenging cycloadditions is reported: a) the one-pot azidonation/cycloaddition of
Crosbie, P, Diez-Gonzalez, S, Lal, S, Perez, J   +3 more
core   +2 more sources

Domino Multicomponent Approach for the Synthesis of Functionalized Spiro-Indeno[1,2-b]quinoxaline Heterocyclic Hybrids and Their Antimicrobial Activity, Synergistic Effect and Molecular Docking Simulation

Molecules, 2019
An expedient synthesis of hitherto unexplored novel hybrid heterocycles comprising dispiropyrrolidine, N-styrylpiperidone and indeno[1,2-b]quinoxaline units has been developed via domino multicomponent 1,3-dipolar cycloaddition strategy employing a new ...
Abdulrahman I. Almansour, Natarajan Arumugam, Raju Suresh Kumar, Dhaifallah M. Al-thamili, Govindasami Periyasami, Karuppiah Ponmurugan, Naif Abdullah Al-Dhabi, Karthikeyan Perumal, Dhanaraj Premnath   +8 more
doaj   +1 more source

Recent Advances in Ene Reactions with Carbon Enophiles

Advanced Synthesis &Catalysis, EarlyView.
Recent advances in the classical intra‐ and intermolecular ene nexus with carbon enophiles (alkenes, alkynes, arynes, and allenes) show a considerable increase in structural complexity and an enormous potential for functional applications in polymer science.
Thomas J. J. Müller
wiley   +1 more source

Activation of dinitrogen as a dipolarophile in 1,3-Dipolar Cycloadditions: A theoretical study using nitrile imines as “Octet” 1,3-Dipoles [PDF]

, 2017
Theoretical calculations at the G4MP2 level of theory demonstrate that it is possible to activate dinitrogen to make it react in dipolar cycloadditions using neutral beryllium derivatives and other neutral metallic compounds.
Alkorta, Ibon, Elguero, José, Montero-Campillo, M. Merced   +2 more
core   +2 more sources

One Step Regioselective Synthesis of 5-Aminoisoxazoles from Nitrile Oxides and α-Cyanoenamines

Molecules, 2004
The 1,3-dipolar cycloaddition of nitrile oxides to 1-cyanoenamines gives 5-aminoisoxazoles regioselectively. Moderate to good yields could be obtained depending on the method used to generate the nitrile oxides. The intermediate isoxazolines could not be
Aïcha Derdour, Michel Vaultier, Amar Saad   +2 more
doaj   +1 more source

1,3-Dipolar Cycloaddition of Isatin-Derived Azomethine Ylides with 2 H-Azirines: Stereoselective Synthesis of 1,3-Diazaspiro[bicyclo[3.1.0]hexane]oxindoles.

Journal of Organic Chemistry, 2019
A regio- and diastereoselective 1,3-dipolar cycloaddition of 2 H-azirines with azomethine ylides generated in situ from isatins and α-amino acids has been elaborated, affording an unprecedented aziridine-fused spiro[imidazolidine-4,3'-oxindole] framework.
A. Angyal, András Demjén, V. Harmat, J. Wölfling, L. Puskás, I. Kanizsai   +5 more
semanticscholar   +1 more source