Results 51 to 60 of about 3,120 (207)

Bortrifluorid-katalysierte Umsetzung von 2H-Azirinen und Vinylaziden mit Nitrilen

open access: yesCHIMIA, 1975
The reaction of 2H-azirines or vinyl azides with nitriles in the presence of boron trifluoride etherate, to yield the corresponding imidazoles (see table), is described.
Heinz Bader, Hans-Jürgen Hansen
doaj   +1 more source

Addition and Cycloaddition Reactions of Phosphinyl- and Phosphonyl-2H-Azirines, Nitrosoalkenes and Azoalkenes

open access: yesMolecules, 2009
An overview of the use of 2H-azirines, conjugated nitrosoalkenes and conjugated azoalkenes bearing phosphorus substituents in addition and cycloaddition reactions is presented, focused on strategies for the synthesis of aminophosphonate and ...
Américo Lemos
doaj   +1 more source

Synthesis and Antiproliferative Activity of Phosphorus Substituted 4-Cyanooxazolines, 2-Aminocyanooxazolines, 2-Iminocyanooxazolidines and 2-Aminocyanothiazolines by Rearrangement of Cyanoaziridines [PDF]

open access: yes, 2021
Several phosphorus-substituted N-acylated cyanoaziridines 2 and N-carbamoylated cyanoziridines 5 were prepared in good to high yields. N-Acylated cyanoaziridines 2 were used, after ring expansion, in an efficient synthesis of oxazoline derivative 3a and ...
Carramiñana Jiménez, Víctor   +3 more
core   +1 more source

Light-induced synthesis of 2H-azirines and its applications in organic chemistry

open access: yesJournal of Saudi Chemical Society
2H-azirines have represented versatile building motifs in the domain of organic chemistry owing to their excellent reaction activity induced by the high strain of the three-membered ring species.
Shibo Lin   +4 more
doaj   +1 more source

Ethyl 2-(Diisopropoxyphosphoryl)-2H-Azirine-3-Carboxylate: Reactions with Activated 1,3-Butadienes [PDF]

open access: yes, 2008
The 12th International Electronic Conference on Synthetic Organic Chemistry session General Organic SynthesisEthyl 2-(diisopropoxyphosphoryl)-2H-azirine-3-carboxylate was generated “in situ” and reacted with a number of 1,3-butadienes.
Alves, M. José   +3 more
core   +1 more source

Stabile Zink-Komplexe von 3-Amino-2H-azirinen

open access: yesCHIMIA, 1978
3-Dimethylamino-2,2-dimethyl-2H-azirine (4a), which is known to react easily with Brönsted acids and electrophiles, forms a stable complex 5a with ZnBr2. In contrast to all other reactions of 4a, the three-membered ring in this complex is preserved. The
Kurt Dietliker   +3 more
doaj   +1 more source

I. The Synthesis, Absolute Configuration, and Stereochemistry of Thermal Decomposition of (+)-3R,5R- and (+)-3R,5S-3-Ethyl-5-Methyl-1-Pyrazoline. II. Mechanistic Investigations of the Thermal Decompositions of 2H-Azirines [PDF]

open access: yes, 1976
I. (+)-3R,5R- and (+)-3R,5S-3-ethyl-5-methyl-1-pyrazolines (34T and 34C, respectively) have been prepared in optically active form. Their stereochemistries have been determined by correlation with (-)-R-3-hexanol and (-)-R-2-bromohexane.
Wendling, Larry Allan
core   +1 more source

Neuere Methoden zur Ringerweiterung organischer Verbindungen

open access: yesCHIMIA, 1980
The actual interest in the construction of cyclic compounds via ring expansion reactions is demonstrated in the first chapter by means of typical examples.
Heinz Heimgartner
doaj   +1 more source

Diverse reactivity of maleimides in polymer science and beyond

open access: yesPolymer International, Volume 74, Issue 4, Page 296-306, April 2025.
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 ...
Bruce E Kirkpatrick   +2 more
wiley   +1 more source

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