Results 1 to 10 of about 72,904 (250)

Assembly drives regioselective azide-alkyne cycloaddition reaction [PDF]

open access: yesNature Communications, 2023
Azide-alkyne cycloaddition reaction is a very common organic reaction to synthesize nitrogen-containing heterocycles. Once catalyzed by Cu(I) or Ru(II), it turns out to be a click reaction and thus is widely applied in chemical biology for labeling ...
Qiaochu Jiang   +6 more
doaj   +2 more sources

The Puzzle of the Regioselectivity and Molecular Mechanism of the (3+2) Cycloaddition Reaction Between E-2-(Trimethylsilyl)-1-Nitroethene and Arylonitrile N-Oxides: Molecular Electron Density Theory (MEDT) Quantumchemical Study [PDF]

open access: yesMolecules
The regioselectivity and molecular mechanism of the (3+2) cycloaddition reaction between E-2-(trimethylsilyl)-1-nitroethene and arylonitrile N-oxides were explored on the basis of the ωB97XD/6-311+G(d) (PCM) quantumchemical calculations.
Mikołaj Sadowski   +2 more
doaj   +2 more sources

Valence-isomer selective cycloaddition reaction of cycloheptatrienes-norcaradienes [PDF]

open access: yesNature Communications
The rapid and precise creation of complex molecules while controlling multiple selectivities is the principal objective in synthetic chemistry. Combining data science and organic synthesis to achieve this goal is an emerging trend, but few examples of ...
Shingo Harada   +4 more
doaj   +2 more sources

MOF-Derived Cu@N-C Catalyst for 1,3-Dipolar Cycloaddition Reaction [PDF]

open access: yesNanomaterials, 2022
Cu(im)2-derived Cu@N-C composites were used for the first time as efficient heterogeneous catalysts for one-pot 1,3-dipolar cycloaddition of terminal alkynes, aryl halides, and sodium azide to preparation of 1,4-disubstituted 1,2,3-triazoles with broad ...
Zhuangzhuang Wang   +3 more
doaj   +2 more sources

The Choice of Rhodium Catalysts in [2+2+2] Cycloaddition Reaction: A Personal Account [PDF]

open access: yesMolecules, 2022
[2+2+2] Cycloaddition reaction is a captivating process that assembles six-membered rings from three unsaturations with complete atom economy. Of the multiple transition metals that can be used to catalyze this reaction, rhodium offers many advantages ...
Anna Pla-Quintana, Anna Roglans
doaj   +2 more sources

HUISGEN AND HIS ADVENTURES IN A PLAYGROUND OF MECHANISMS AND NOVEL REACTIONS [PDF]

open access: yesQuímica Nova, 2021
The death of professor Rolf Huisgen (1920-2020) was announced on March 26th 2020, in the midst of the COVID-19 pandemic. Professor Huisgen was professor emeritus at the University of Munich in Germany, and studied in detail the mechanism of the 1,3 ...
Daniel T. G. Gonzaga   +5 more
doaj   +1 more source

The fate of heterogeneous catalysis & click chemistry for 1,2,3-triazoles: Nobel prize in chemistry 2022

open access: yesCatalysis Communications, 2023
The demand for environmental friendly methodologies had shifted the the approach of scientific community for using easy and green reaction conditions instead of using hazardous and harsh reaction conditions.
Vijay Kumar   +3 more
doaj   +1 more source

Computational study of a model system of enzyme-mediated [4+2] cycloaddition reaction. [PDF]

open access: yesPLoS ONE, 2015
A possible mechanistic pathway related to an enzyme-catalyzed [4+2] cycloaddition reaction was studied by theoretical calculations at density functional (B3LYP, O3LYP, M062X) and semiempirical levels (PM6-DH2, PM6) performed on a model system.
Evgeniy G Gordeev, Valentine P Ananikov
doaj   +1 more source

Poly(ionic liquid)s for Photo‐Driven CO2 Cycloaddition: Electron Donor–Acceptor Segments Matter

open access: yesAdvanced Science, 2023
CO2 cycloaddition with epoxides is a key catalytic procedure for CO2 utilization. Several metal‐based catalysts with cocatalysts are developed for photo‐driven CO2 cycloaddition, while facing difficulties in product purification and continuous reaction ...
Xu Fang   +12 more
doaj   +1 more source

MnVI-NP–Catalyzed Generation of Nitrile Oxides: Easy Access to Isoxazolines and Isoxazoles via Stereoselective 1,3-Dipolar Cyclo­addition Reactions

open access: yesSynOpen, 2022
The versatility and effectiveness of MnVI-NPs as a catalyst is examined for the generation of nitrile oxides from aldoximes and subsequent 1,3-dipolar cycloaddition reactions.
Yasmin Saima, Saikat Khamarui
doaj   +1 more source

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