Results 31 to 40 of about 26,473 (143)
Beilstein Journal of Organic Chemistry, 2011 An efficient synthesis of 1,3-diaryl-4-halo-1H-pyrazoles was achieved. The synthesis involves the [3 + 2] dipolar cycloaddition of 3-arylsydnones and 2-aryl-1,1-dihalo-1-alkenes. The process proceeds smoothly in moderate to excellent yields. 1,3-Diaryl-4-
Yiwen Yang +4 more
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Beilstein Journal of Organic Chemistry, 2012 A rapid and simple procedure was devised for the synthesis of multifunctionalized cyclic β-amino esters and γ-amino alcohols via the 1,3-dipolar cycloaddition of nitrile oxides to β-aminocyclopentenecarboxylates.
Melinda Nonn +3 more
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Recent Progress in Nitro-Promoted Direct Functionalization of Pyridones and Quinolones
Molecules, 2020 Nitro group is one of the most important functional groups in organic syntheses because its strongly electron-withdrawing ability activates the scaffold, facilitating the reaction with nucleophilic reagents or the Diels−Alder reaction.
Feiyue Hao, Nagatoshi Nishiwaki
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Synthesis of 4-Arylselanyl-1H-1,2,3-triazoles from Selenium-Containing Carbinols
Molecules, 2021 In this work, we present a simple way to achieve 4-arylselanyl-1H-1,2,3-triazoles from selenium-containing carbinols in a one-pot strategy. The selenium-containing carbinols were used as starting materials to produce a range of selanyl-triazoles in ...
Francesca Begini +6 more
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Dirhodium(II)-catalyzed [3 + 2] cycloaddition of N-arylaminocyclopropane with alkyne derivatives
Beilstein Journal of Organic Chemistry, 2019 Dirhodium(II) complex-catalyzed [3 + 2] reactions between N-arylaminocyclopropanes and alkyne derivatives are described. The cycloaddition products proved to be versatile synthetic intermediates.
Wentong Liu +4 more
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A Review of the Synthetic Strategies toward Dihydropyrrolo[1,2-a]Pyrazinones
Organics, 2021 Dihydropyrrolo[1,2-a]pyrazinone rings are a class of heterocycles present in a wide range of bioactive natural products and analogues thereof. As a direct result of their bioactivity, the synthesis of this privileged class of compounds has been ...
Pieterjan Winant +4 more
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Exploring endoperoxides as a new entry for the synthesis of branched azasugars
Beilstein Journal of Organic Chemistry, 2017 A new class of nitrogen-containing endoperoxides were synthesised by a photochemical [4 + 2]-cycloaddition between a diene and singlet oxygen. The endoperoxides were dihydroxylated and protected to provide a series of endoperoxide building blocks for ...
Svenja Domeyer +3 more
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Molecules, 2000 Ab initio and DFT quantum chemical calculations have been applied to a study of the Diels-Alder reaction of o-benzoquinone as diene and norbornadiene as dienophile.
Ronald N. Warrener +2 more
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, 2014 Citation: 'cycloaddition' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.C01496 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial
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Computational and Spectral Investigation of 5,12-Dihydro-5,12-ethanonaphthacene-13-carbaldehyde
Molecules, 2011 A conformational search of 5,12-dihydro-5,12-ethanonaphthacene-13-carbaldehyde predicted the presence of twelve conformations. The geometry of the twelve conformations established at the B3LYP/6-31G* level showed only six unique ones.
Abdulrahman I. Almansour +5 more
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