Results 21 to 30 of about 3,434 (226)

Azirine ligation: fast and selective protein conjugation via photoinduced azirine–alkene cycloaddition [PDF]

Chemical Communications, 2010
We report a new bioorthogonal ligation reaction between p-nitrodiphenylazirine and dimethyl fumarate. This photoinduced azirine-alkene cycloaddition provides a rapid (~2 min) and highly selective route to protein conjugation at neutral pH and room temperature in biological medium.
Reyna K V, Lim, Qing, Lin
openaire   +2 more sources

Synthesis of α-Aminophosphonic Acid Derivatives Through the Addition of O- and S-Nucleophiles to 2H-Azirines and Their Antiproliferative Effect on A549 Human Lung Adenocarcinoma Cells

Molecules, 2020
This work reports a straightforward regioselective synthetic methodology to prepare α-aminophosphine oxides and phosphonates through the addition of oxygen and sulfur nucleophiles to the C–N double bond of 2H-azirine derivatives. Determined by the nature
Victor Carramiñana, Ana M. Ochoa de Retana, Francisco Palacios, Jesús M. de los Santos   +3 more
doaj   +1 more source

Synthesis, structural characterization, antimicrobial and cytotoxic effects of aziridine, 2-aminoethylaziridine and azirine complexes of copper(II) and palladium(II). [PDF]

, 2012
The synthesis, spectroscopic and X-ray structural characterization of copper(II) and palladium(II) complexes with aziridine ligands as 2-dimethylaziridine HNCH2CMe2 (a), the bidentate N-(2-aminoethyl)aziridines C2H4NC2H4NH2 (b) or CH2CMe2NCH2CMe2NH2 (c ...
A. Hauss, Alper, Amarasekera, Atagi, Aw, B. Rozalska, Barnes, Beck, Beck, Beckerath, Beuter, Bobka, Budzisz, Cantrell Jr, Cheikh, Danzer, Dietliker, Dos Santos Filho, Duggan, E. Budzisz, Fritz, Galanski, Hassner, Heck, Herberhold, Höfer, I.-P. Lorenz, Ihata, Iyengar, Iyengar, Izumi, J. N. Roedel, Jackson, Jackson, Katzenellenbogen, Kho, Kojima, Lefemine, Leung, Leung, Liu, Lorenz, Lorenz, Lorenz, Lorenz, M. Rozalski, M. Więckowska-Szakiel, Maanen, McLachlan, Milstein, Mitzel, Noll, Palom, Paz, Peng, Porta, Putzien, R. Bobka, Rajski, Roedel, Roedel, Root, S. Wirth, Schold Jr., Sheldrick, Singh, Singh, Sosnovsky, Sweeney, Trost, U. Krajewska, Ukraintsev, Ukraintsev, Ware, Ware, Ware, Watson, Wilberger, Wilberger, Wild, Yadav, Yokoi   +81 more
core   +1 more source

Optically active aziridine esters by nucleophilic addition of nitrogen heterocycles to a chiral 2H-azirine-2-carboxylic ester [PDF]

, 2003
Chiral enriched ethyl 3-methyl-2H-azirine-2-carboxylate acts as an efficient alkylating agent for a variety of five membered aromatic nitrogen heterocycles.Fundação para a Ciência e Tecnologia - POCTI/32723/QUI/2000 ...
Alves, M. José, Fortes, A. Gil, Gonçalves, Luís F. F. F.   +2 more
core   +1 more source

Photochemische Cycloaddition von 3-Phenyl-2H-azirinen mit Ketenen

CHIMIA, 1972
Irradiation of 2,2-dimethyl-3-phenyl- (1c) and 2,3-diphenyl-2H-azirine (1d) in benzene solution in the presence of ketene (5) yields 2,2-dimethyl-4-phenyl- (6) and 2,4-diphenyl-5-methylen-3-oxazoline (7), respectively. Similar cycloadducts (9a to d) are
H. Heimgartner, P. Gilgen, U. Schmid, H.-J. Hansen, H. Schmid, K. Pfoertner, K. Bernauer   +6 more
doaj   +1 more source

Electrochemically Induced Synthesis of Imidazoles from Vinyl Azides and Benzyl Amines

Molecules, 2022
An electrochemically induced synthesis of imidazoles from vinyl azides and benzyl amines was developed. A wide range of imidazoles were obtained, with yields of 30 to 64%.
Vera A. Vil’, Sergei S. Grishin, Alexander O. Terent’ev   +2 more
doaj   +1 more source

Azirine alkylation

Tetrahedron Letters, 1976
Tetrahedron Letters 17 (1976) 1413-1414. doi:10.1016/S0040-4039(00)71270-6 ; Received by publisher: 1975-12-23 ; Harvest Date: 2016-01-04 12:20:50 ; DOI:10.1016/S0040-4039(00)71270-6 ; Page Range: 1413 ...
Department of Chemistry, University of Florida Gainesville, Florida 32611 U.S.A. ( host institution ), Deyrup, James A. ( author ), Szabo, William A. ( author )   +2 more
openaire   +2 more sources

Cycloaddition of methyl 2-(2,6-dichorophenyl)-2H-azirine-3-carboxylate to electron rich 2-azadienes [PDF]

, 2003
Tert-Butyldimethylsililoxy-2-aza-1,3-butadienes react with 2H-azirine 3 leading to Diels-Alder cycloadducts in moderate yields. The reactions are endo- and regio- selective with the azirine being added by its less hindered face. There is only one product
Alves, M. José, Durães, M. Miguel, Fortes, A. Gil   +2 more
core   +1 more source

Access to highly substituted oxazoles by the reaction of α-azidochalcone with potassium thiocyanate

Beilstein Journal of Organic Chemistry, 2020
The reactivity of α-azidochalcones has been explored for the preparation of highly substituted oxazoles via a 2H-azirine intermediate. The azidochalcones, when treated with potassium thiocyanate in the presence of potassium persulfate, lead to 2,4,5 ...
Mysore Bhyrappa Harisha, Pandi Dhanalakshmi, Rajendran Suresh, Raju Ranjith Kumar, Shanmugam Muthusubramanian   +4 more
doaj   +1 more source

Diels-alder cycloaddition of 2-azadienes to methyl 2-(2,6-dichlorophenyl)-2H-azirine-3-carboxylate in the synthesis of methyl 4-oxo-1,3-diazabicyclo[4.1.0]heptane-6-carboxylates [PDF]

, 2004
A number of fused 4-oxo-1,3-diazabicyclo[4.1.0]heptane-6-carboxylates, a new type of compound, have been obtained by Diels-Alder cycloaddition between nucleophilic 2-azadienes and an electrophilic 2H-azirine.
Alves, M. José, Durães, M. Miguel, Fortes, A. Gil   +2 more
core   +1 more source