Results 81 to 90 of about 42,977 (261)

Domino 1,3-Dipolar Cycloadditions of N-Alkyl-α-Amino Esters with Paraformaldehyde: A Direct Access to α-Hydroxymethyl α-Amino Acids [PDF]

, 2014
N-Alkyl-α-amino esters undergo a domino reaction, based on the iminium cation generation, with paraformaldehyde, followed by a 1,3-dipolar cycloaddition of the stabilized azometh­ine ylide with another equivalent of formaldehyde.
Castelló Moncayo, Luis Miguel, Nájera, Carmen, Sansano, Jose M.   +2 more
core   +2 more sources

“One-pot” dispersion ATRP and alkyne-azide Huisgen’s 1,3-dipolar cycloaddition in supercritical carbon dioxide: towards the formation of functional microspheres [PDF]

, 2010
Functional polymers were successfully prepared in scCO2 by combining alkyne-azide 1,3-dipolar Huisgen’s cycloaddition and dispersion ATRP in a “one pot” process using new perfluorinated polymeric amino-based ligands that had a dual role, i.e.
Calberg, Cédric, Detrembleur, Christophe, Grignard, Bruno, Jérôme, Christine   +3 more
core   +1 more source

Cyclooctyne-based reagents for uncatalyzed click chemistry: A computational survey [PDF]

, 2009
With the goal of identifying alkyne-like reagents for use in click chemistry, but without Cu catalysts, we used B3LYP density function theory (DFT) to investigate the trends in activation barriers for the 1,3-dipolar cycloadditions of azides with various
Chenoweth, David, Chenoweth, Kimberly, Goddard, William A. III   +2 more
core   +1 more source

An Efficient Synthesis of Novel Dispirooxindole Derivatives via One-Pot Three-Component 1,3-Dipolar Cycloaddition Reactions

Molecules, 2012
A series of novel dispirooxindoles have been synthesized through three-component 1,3-dipolar cycloaddition of azomethine ylides generated in situ by the decarboxylative condensation of isatin and an α-amino acid with the dipolarophile 5-benzylidene-1,3 ...
Yucheng Wang, Juxian Wang, Hongtao Liu, Huiyuan Wang, Wei Lin, Lexing Xu, Zhibin Huang, Gang Chen, Qian Zhao, Daqing Shi   +9 more
doaj   +1 more source

Recent Advances in Isatin–Thiazole Hybrids: Synthesis, Structural Design, and Biological Application

Chemistry &Biodiversity, EarlyView.
ABSTRACT Isatin–thiazole hybrids are considered privileged chemical scaffolds due to their broad spectrum of pharmacological properties, making them attractive candidates for drug development. As a result, isatin–thiazole derivatives have emerged as a prominent class of hybrid heterocycles and have been the focus of extensive research in recent years ...
Isadora M. G. Andrade, Edson de O. Lima Filho, Caio F. Valadão, Luana da S. M. Forezi, Fernando de C. da Silva   +4 more
wiley   +1 more source

1,3-Dipolar cycloaddition of diazomethane with a chiral azlactone

Tetrahedron Letters, 1994
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.
Cativiela, Carlos, Díaz de Villegas, María D., Jiménez, Ana I., Lahoz, Fernando J.   +3 more
openaire   +4 more sources

(S)-(-)-Limonene Derivatives Containing (1H-1,2,3-Triazol-4-yl)methyl 4-Bromobenzoate

Molbank, 2011
The synthesis of (S)-(-)-limonene derivatives containing (1H-1,2,3-triazol-4-yl)methyl 4-bromobenzoate were obtained by epoxidation, azidolysis and Huisgen’s 1,3-dipolar cycloaddition.
Guillermo Valdomir, Danilo Davyt
doaj   +1 more source

A porphyrin-centred fullerene tetramer containing an N@C60 substituent [PDF]

Royal Society Open Science, 2018
An N@C60-containing C60 tetramer was synthesized by quadruple 1,3-dipolar cycloaddition (Prato) reaction. This molecule demonstrates the N@C60 qubit's ability to form covalently linked arrays.
Harry Macpherson, Stuart Cornes, Shen Zhou, Kyriakos Porfyrakis   +3 more
doaj   +1 more source

Biocompatible Chemistry: A Plug‐and‐Play Toolbox for Chemical Biology Research

ChemBioChem, EarlyView.
The “plug‐and‐play” nature of biocompatible chemistry makes it a powerful toolbox for investigating complicated biological systems and producing drug leads for clinical usages. This review summarizes the commonly used biocompatible reactions and the recent advances of their representative applications in chemical biology research, thus highlighting the
Adam R. Lovato, Zeng Lin, Qingfei Zheng
wiley   +1 more source

Synthesis of Chromen[4,3-b]pyrrolidines by Intramolecular 1,3-Dipolar Cycloadditions of Azomethine Ylides: An Experimental and Computational Assessment of the Origin of Stereocontrol [PDF]

, 2015
Azomethine ylides, generated from imine-derived O-cinnamyl or O-crotonyl salicylaldeyde and α-amino acids, undergo intramolecular 1,3-dipolar cycloaddition, leading to chromene[4,3-b]pyrrolidines.
Arrieta, Ana, Barcellos, Julio C.F., Cossío Mora, Fernando Pedro, Cossío, Unai, Costa, Paulo R.R., Cózar Ruano, Abel de, Dias, Ayres G., Nájera, Carmen, Sansano, Jose M.   +8 more
core   +2 more sources