Results 21 to 30 of about 1,229 (176)

Synthesis of Δ1‑Pyrrolines via Formal (3 + 2)-Cycloaddition of 2H‑Azirines with Enones Promoted by Visible Light under Continuous Flow [PDF]

ACS Omega
Lorena S. R. Martelli, Lucas G. Furniel, Pedro H. O. Santiago, Javier Ellena, Arlene G. Corrêa   +4 more
doaj   +2 more sources

Diverse reactivity of maleimides in polymer science and beyond. [PDF]

Polym Int
This mini‐review provides a thorough overview of maleimide chemistry, highlighting its diverse reactivity in polymer and materials science applications. Abstract Maleimides are remarkably versatile functional groups, capable of participating in homo‐ and copolymerizations, Diels–Alder and (photo)cycloadditions, Michael additions, and other reactions ...
Kirkpatrick BE, Anseth KS, Hebner TS.
europepmc   +2 more sources

New syntheses of aziridines and azirines.

, 1970
The work presented in this thesis concerns the oxidation of N-amino compounds and the interception of the reactive intermediates, the postulated amino-nitrenes. The Introduction has been divided into three parts concerning (1) the synthesis of aziridines
David John. Anderson (7700939)
core   +6 more sources

Organo-photocatalytic Synthesis of Functionalized Pyrroles from 2H-Azirines and α-Substituted Nitroalkenes

SynOpen, 2022
An efficient organo-photocatalytic method for the synthesis of tetrasubstituted pyrroles bearing a ketone, ester, alcohol, or nitro group at the 3-position has been developed.
Lalita Devi, Poornima Mishra, Ayushi Pokhriyal, Namrata Rastogi   +3 more
doaj   +1 more source

Fragmentation of Carbohydrate Anomeric Alkoxyl Radicals. A New Synthesis of Chiral β-Iodo Azides, Vinyl Azides, and 2H-Azirines

, 2016
The reaction of 3-azido-2,3-dideoxy-hexopyranose compounds from the d-gluco, d-galacto, d-lacto, and l-arabino carbohydrate series, with (diacetoxyiodo)benzene and iodine, generated 2-azido-1,2-dideoxy-1-iodo-alditols with one carbon less than the ...
María S. Rodríguez (3030198), Alan R. Kennedy (1266753), Carmen R. Alonso-Cruz (2435974), Ernesto Suárez (2440549)   +3 more
core   +2 more sources

[3 + 2]-Cycloadditions of nitrile ylides after photoactivation of vinyl azides under flow conditions

Beilstein Journal of Organic Chemistry, 2013
The photodenitrogenation of vinyl azides to 2H-azirines by using a photoflow reactor is reported and compared with thermal formation of 2H-azirines. Photochemically, the ring of the 2H-azirines was opened to yield the nitrile ylides, which underwent a [3
Stephan Cludius-Brandt, Lukas Kupracz, Andreas Kirschning   +2 more
doaj   +1 more source

Synthesis of Stable 1H-Azirines Reinvestigated: A Structural Corrigendum [PDF]

, 2012
The isoquinoline-catalyzed synthesis of pretended 1H-azirines from phenacyl bromides and N,N\'-dialkylcarbodiimides was repeated. The products do not possess the structure of antiaromatic 1H-azirines, but simple N-acyl-N,N\'-dialkylureas were formed ...
Peisker, Heiko, Banert, Klaus, Hagedorn, Manfred   +2 more
core   +1 more source

Copper(I)-catalyzed asymmetric decarboxylative Mannich reaction enabled by acidic activation of 2H-azirines

Nature Communications, 2019
Due to their poor electrophilicity, 2H-azirines do not easily react with nucleophiles. Here, the authors show an acidic activation of 2H-azirines by cyanoacetic acid coupling partners affording chiral aziridines containing vicinal tetrasubstituted and ...
Hai-Jun Zhang, Yan-Cheng Xie, Liang Yin
doaj   +1 more source

3-Amino-2H-azirine, Moleküle mit vielfältigen Reaktionsmöglichkeiten

CHIMIA, 1979
3-Amino-2H-azirines, cyclic three-membered amidines with an estimated ring strain of about 200 kJ/mole, undergo a variety of reactions. Thereby, each of the azirine bonds can be broken: Thermolysis leads to the rupture of the C(2),C(3)-bond, with strong
Heinz Heimgartner
doaj   +1 more source

Reactivity of 2-Halo-2H-azirines. 1. Reactions with Nucleophiles [PDF]

, 2002
Nucleophilic substitution reactions of 2-halo-2H-azirines 1a, 1b, 1d, and 1e with potassium phthalimide and aniline allowed the preparation of new substituted 2H-azirines 2−5.
Veiga, Luiz Alte da, Melo, Teresa M. V. D. Pinho e, Lopes, Cláudia S. J., Beja, Ana M., Gonsalves, António M. d'A. Rocha, Silva, Manuela R., Paixão, José A.   +6 more
core   +1 more source