Results 21 to 30 of about 41,109 (281)

Dynamic Catalytic Highly Enantioselective 1,3‐Dipolar Cycloadditions [PDF]

Angewandte Chemie International Edition, 2021
AbstractIn dynamic covalent chemistry, reactions follow a thermodynamically controlled pathway through equilibria. Reversible covalent‐bond formation and breaking in a dynamic process enables the interconversion of products formed under kinetic control to thermodynamically more stable isomers.
Herbert Waldmann, Herbert Waldmann, Michael Grigalunas, Okan Yildirim, Okan Yildirim, Andrey P. Antonchick, Andrey P. Antonchick, Andrey P. Antonchick, Lukas Brieger, Carsten Strohmann   +9 more
openaire   +6 more sources

ChemInform Abstract: Iridium‐Catalyzed 1,3‐Dipolar Cycloadditions [PDF]

ChemInform, 2010
AbstractReview: 47 refs.
Carmona, Daniel, Oro, Luis A.
openaire   +4 more sources

Nanoparticle‐Catalysed 1,3‐Dipolar Cycloadditions

European Journal of Organic Chemistry, 2020
The 1,3‐dipolar cycloadditions of azomethine‐ylides and ‐imines, nitrones, nitrilimines, and azides catalysed by inorganic nanoparticles are described. Emphasis is given to the nanometric catalysts involved, their structure, characterisation, and recyclability and, when remarkable, their preparation.
Ponti A., Molteni G.
openaire   +4 more sources

Highly Efficient Construction of Sugar-Fused Spirochromanono Pyrrolidines/Pyrrolizidines/Thiolizidines via 1,3-Dipolar Cycloaddition of Azomethine Ylides

SynOpen, 2017
A variety of sugar-fused chromanono pyrrolidines/pyrrolizidines/thiolizidines have been synthesized by intermolecular 1,3-dipolar cycloaddition reaction of azomethine ylides (generated from glucose aldehyde and different secondary amino acids) with ...
Sirisha Nallamala, Srikumar Mannem, Raghunathan Raghavachary   +2 more
doaj   +1 more source

Theoretical analysis of the mechanism and regioselectivity of the 1, 3-dipolar cycloaddition of E-3-(dimethylamino)-1-(10H-phenothiazin-2-yl)prop-2-en-1-one with some nitrilimines using DFT and the distortion/interaction model

Acta Chimica Slovenica, 2015
The regiochemistry of 1,3-dipolar cycloaddition reactions of E-3-(dimethylamino)-1-(10H-phenothiazin-2-yl) prop-2-en-1-one with some nitrilimines were investigated using density functional theory (DFT) -based reactivity indexes, activation energy ...
Farid Moeinpour, Amir Khojastehnezhad
doaj   +1 more source

Supramolecular Encapsulation of Neutral Diazoacetate Esters and Catalyzed 1,3-Dipolar Cycloaddition Reaction by a Self-Assembled Hexameric Capsule [PDF]

, 2015
Diazoacetate esters proved to be suitable neutral guests for the self-assembled resorcin[4]arene hexameric capsule. The hydrogen- bonded supramolecular host catalyzed the 1,3-dipolar cycloaddition reaction between diazoacetate esters and electron- poor ...
Aoyama, Aoyama, Avram, Avram, Avram, Avram, Barrett, Bianchini, Bianchini, Bini, Bini, Borsato, Branstetter, Brinker, Cavarzan, Cavarzan, Clark, Cohen, Di, Dong, Dougherty, Gao, Gramage-Doria, Inokuma, Jones, Kang, Kang, Kano, Lévai, Maas, Maas, MacGillivray, Mecozzi, Noels, Novikov, Oshovsky, Padwa, Perrin, Philip, Purse, Radha Krishna, Radha Krishna, Ramozzi, Raynal, Raynal, Regitz, Schnatwinkel, Schneider, Schneider, Shimizu, Shivanyuk, Shivanyuk, Slovak, Slovak, Smulders, Still, Ugono, Wang, Yamanaka, Yao, Zhang   +60 more
core   +1 more source

Nitrile Oxide, Alkenes, Dipolar Cycloaddition, Isomerization and Metathesis Involved in the Syntheses of 2-Isoxazolines

Molecules, 2023
The involvement of 1,3-dipolar cycloaddition (1,3-DP), double bond migration, metathesis, and nitrile oxide (including in situ-generated nitrile oxide) as dipoles, together with the C=C bond containing dipolarophiles, in the syntheses of 2-isoxazolines ...
Stanisław Krompiec, Piotr Lodowski, Aneta Kurpanik-Wójcik, Bogumiła Gołek, Angelika Mieszczanin, Aleksandra Fijołek, Marek Matussek, Klaudia Kaszuba   +7 more
doaj   +1 more source

Conformer-specific polar cycloaddition of dibromobutadiene with trapped propene ions [PDF]

, 2021
Diels-Alder cycloadditions are efficient routes for the synthesis of cyclic organic compounds. There has been a long-standing discussion whether these reactions proceed via stepwise or concerted mechanisms. Here, we adopt a new experimental approach to explore the mechanistic details of the model polar cycloaddition of 2,3-dibromo-1,3-butadiene with ...
arxiv   +1 more source

Strain-Promoted 1,3-Dipolar Cycloaddition of Cycloalkynes and Organic Azides

Topics in current chemistry, 2016
A nearly forgotten reaction discovered more than 60 years ago—the cycloaddition of a cyclic alkyne and an organic azide, leading to an aromatic triazole—enjoys a remarkable popularity.
J. Dommerholt, F. Rutjes, F. V. van Delft   +2 more
semanticscholar   +1 more source

Catalytic asymmetric construction of spiropyrrolidines via 1,3-dipolar cycloaddition of azomethine ylides.

Organic and biomolecular chemistry, 2018
Spirocyclic pyrrolidines are structural motifs frequently found in a wide variety of natural products, pharmaceuticals and biologically significant compounds.
X. Fang, Chun‐Jiang Wang
semanticscholar   +1 more source