Results 91 to 100 of about 4,239 (193)

Dimerization reactions of aryl selenophen-2-yl-substituted thiocarbonyl S-methanides as diradical processes: a computational study

Beilstein Journal of Organic Chemistry, 2017
An intriguing stepwise diradical mechanism of the dimerization of the reactive intermediate (thiocarbonyl S-methanide) appearing in the reaction of phenyl selenophen-2-yl thioketone with diazomethane was studied by means of computational methods.
Michael L. McKee, Grzegorz Mlostoń, Katarzyna Urbaniak, Heinz Heimgartner   +3 more
doaj   +1 more source

Nitropyridines as 2π-Partners in 1,3-Dipolar Cycloadditions with N-Methyl Azomethine Ylide: An Easy Access to Condensed Pyrrolines. [PDF]

Molecules, 2021
Bastrakov MA, Fedorenko AK, Starosotnikov AM, Shakhnes AK.   +3 more
europepmc   +1 more source

1,3-Dipolar Cycloadditions of Chiral Nitrones [PDF]

, 1989
The asymmetric synthesis of natural products via 1,3-dipolar cycloadditions of chiral nitrones to prochiral olefins has been an area of intense activity over the past decade. The work described in this thesis involves the application of two short, highly
Keirs, David
core  

Multicomponent syntheses of pyrazoles via (3 + 2)-cyclocondensation and (3 + 2)-cycloaddition key steps

Beilstein Journal of Organic Chemistry
Pyrazoles are rarely found in nature but are traditionally used in the agrochemical and pharmaceutical industries, while other areas of use are also actively developing. However, they have also found numerous other applications.
Ignaz Betcke, Alissa C. Götzinger, Maryna M. Kornet, Thomas J. J. Müller   +3 more
doaj   +1 more source

Synthesis of chiral-at-metal rhodium complexes from achiral tripodal tetradentate ligands: resolution and application to enantioselective Diels-Alder and 1,3-dipolar cycloadditions. [PDF]

RSC Adv, 2022
Tejero AG, Carmona M, Rodríguez R, Viguri F, Lahoz FJ, García-Orduña P, Carmona D.   +6 more
europepmc   +1 more source

Studies on 1,3-dipolar cycloadditions

, 2000
Centre of Advanced Studies on Natural Products, Department of Chemistry, University of Calcutta, 92 Acharya Prafulla Chandra Road, Calcutta-700 009, India E-mail : ab@cucc.ernet.in Manuscript received 2 November 2000 Studies on 1,3-dipolar ...
openaire   +2 more sources

Intermolecular 1,3-dipolar cycloadditions of azomethine imines

ARKIVOC, 2006
Raymond C. F. Jones, Stephen J. Hollis, James N. Iley   +2 more
doaj   +1 more source

1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with nitrile oxides and nitrones

, 2010
1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with nitrile oxides and nitrones is described. A series of novel isoxazolines are isolated from the nitrile oxide cycloadditions, whilst the isoxazolines generated from the nitrone cycloadditions ...
Lawrence, Simon E., Kissane, Marie, Maguire, Anita R.   +2 more
core   +1 more source

Theoretical Study of 1,3-Dipolar Cycloadditions Regioselectivity of Benzyl Azide with Glycosyl-O Acetylene Using Density Functional Theory (DFT)

Orbital: The Electronic Journal of Chemistry, 2017
A theoretical study of 1,3-cycloaddition has been carried out using density functional theory (DFT) methods at the B3LYP/6-31G* level. The regioselectivity of the reaction have been clarified through different theoretical approaches: Case of a Two-Center
Adib Ghaleb, Adnane Aouidate, Abdelouahid Sbai, Tahar Lakhlifi, Hamid Maghat, Mohammed Bouachrine   +5 more
doaj  

Enantioselective intramolecular 1,3-dipolar cycloadditions of diazocarbonyl-derived oxidopyryliums

ARKIVOC, 2003
David M. Hodgson, Paul A. Stupple, Craig Johnstone   +2 more
doaj   +1 more source