Results 61 to 70 of about 1,276 (179)

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

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   +4 more sources

2H-Pyrrole und Pyrrole aus 3-Phenyl-2H-azirinen

CHIMIA, 1976
Vinyl-phosphonium salts [2] and phenyl-vinyl-sulfone or divinylsulfone react with benzonitril-methylides a (which are photochemically generated from 3-phenyl-2H-azirines 1 and 2) to give, via the nonisolated intermediates of type b, 2H-pyrrole 4 and the
Ulrich Widmer, Nikolas Gakis, Bruno Arnet, Heinz Heimgartner, Hans Schmid   +4 more
doaj   +1 more source

Photochemistry of N‐Substituted, N′‐Tosyl Diphenyl Sulfondiimines

Journal of Physical Organic Chemistry, Volume 39, Issue 8, August 2026.
The irradiation of N‐substituted, N′‐tosyl diphenyl sulfondiimines with UV light induces the sequential photorelease of two different nitrenes. ABSTRACT Sulfondiimines are an emerging sulfur(VI) functional group with increasing use in synthesis and medicinal chemistry, yet their photochemical behavior has remained largely unexplored.
Bashar Aziz, Paul Danyi, John P. Carney, Ryan D. McCulla   +3 more
wiley   +1 more source

Funktionalisierung von Peptiden auf der festen Phase im späten Synthesestadium

Angewandte Chemie, Volume 138, Issue 31, 27 July 2026.
Peptidmodifikationen sind für die Kontrolle der Eigenschaften von Peptidwirkstoffen von entscheidender Bedeutung. Daher sind Strategien, die einen effizienten und schnellen Einbau nicht‐kanonischer Modifikationen in Peptide in Parallelformaten ermöglichen, sehr gefragt.
Marius Werner, Truc Lam Pham, Franziska Thomas   +2 more
wiley   +1 more source

Lewis Acid Mediated Alkylation and Diels-Alder Reactions of 2H-Azirines

, 2002
This thesis describes the use of 2H-azirines as reactivesubstrates in Lewis acid catalysed nucleophilic additions andin the Diels-Alder reaction.A number of carbon nucleophiles have been added to aseries of 2H-azirines in the presence and absence ofBF3 ...
Risberg, Erik
core   +2 more sources

Azirinium ylides from alkoxycarbonylcarbenoids and 2H-azirines: Generation and transformations

, 2006
Dirhodium tetraacetate-catalyzed decomposition of diazo esters in the presence of 3-aryl-2H-azirines having no substituent in the 2-position gives rise to azirinium ylides which then undergo isomerization into 2-azabuta-1,3-diene derivatives or (in the ...
Magull, Joerg, Amer, A. A., Novikov, M. S., Vidovic, D., Khlebnikov, Alexander F., Kostikov, Rafael R.   +5 more
core   +1 more source

Azirines. III. The Preparation of Azirine Derivatives by the Base-Catalyzed Rearrangement of Quaternary Hydrazones [PDF]

Bulletin of the Chemical Society of Japan, 1968
Abstract An attempt to prepare azirines by the base-catalyzed rearrangement of some quaternary hydrazones gave the corresponding azirine derivatives. Namely, 2-phenyl-3-methylazirine was obtained by the treatment of propiophenone dimethylhydrazone methiodide with potassium t-butoxide, but treatment with sodium isopropoxide gave 2,5 ...
openaire   +1 more source

(2‐Phosphinophenyl)aluminum Dichloride Complexes as Intramolecular Al/P Frustrated Lewis Pairs for Ketone, Ester, and Imine Activation

Chemistry – A European Journal, Volume 32, Issue 28, 25 July 2026.
Three 2‐phosphinophenylaluminum dichloride complexes were synthesized and characterized as novel intramolecular FLPs. These FLP systems exhibit high Lewis acidity and effectively activate challenging substrates including aliphatic ketones, imines, and esters. DFT analysis revealed that strain release and Al–P dynamics govern their reactivity. Abstract (
Yoshihiro Nishimoto, Hirotaka Okamoto, Makoto Yasuda   +2 more
wiley   +1 more source

The chemistry of enaminones, diazocarbonyls and small rings: our contribution

Journal of the Brazilian Chemical Society, 2003
After thirty two years in Brazil and retired from Universidade Estadual de Campinas the author wishes to present this account, a summary of a large part of the research in synthetic methodology developed by the research groups of Albert J.
Kascheres Concetta Montanile
doaj