Results 41 to 50 of about 1,229 (176)

Synthesis of polyhydroxylated 2h-azirines and 2-halo-2h-azirines from 3-azido-2,3-dideoxyhexopyranoses by alkoxyl radical fragmentation

, 2008
The reaction of 3-azido-2,3-dideoxypyranose and 3-azido-2,3-dideoxy-2-halohexopyranose compounds with (diacetoxyiodo)benzene and iodine generated 2-azido-1,2-dideoxy-1-iodoalditols and 2-azido-1,2-dideoxy-1-halo-1-iodoalditols, respectively.
Suarez, E., Kennedy, A.R., Rodriguez, M.S., Alonso-Cruz, C.R.   +3 more
core   +4 more sources

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

Journal 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, Yiwen Chu, Junfeng Deng, Fangqing Xie, Lifeng Zhao   +4 more
doaj   +1 more source

Facile Synthesis of 2-Dimethylamino-Δ-1-Azirine Derivatives by Thermal or Photo-Isomerization of Isoxazoles [1]

CHIMIA, 1976
3,5-Bisdimethylamino-isoxazoles II are obtained easily from 1,3-dichloro-trimethinecyanine I and a water solution of hydroxylamine. Besides precedented photo-isomerization of 4-substituted isoxazoles IIb,c to azirines IIIb,c near quantitative thermal ...
G.J. de Voghel, T.L. Eggerichs, Brigitte Clamot, H.G. Viehe   +3 more
doaj   +1 more source

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

CHIMIA, 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, Ursula Schmid, Gabriele Mukherjee-Müller, Heinz Heimgartner   +3 more
doaj   +1 more source

Hybrid Macrocyclic Peptides — Synthetic Strategies to Diversify and Cyclize Peptide Libraries in Phage Display Selections

Chemistry – A European Journal, EarlyView.
Hybrid macrocyclic peptides unite genetically encoded peptide libraries with the structural complexity of synthetic small molecules. This Review critically analyzes phage‐compatible cyclization and diversification chemistries, highlights emerging opportunities beyond traditional cysteine‐based approaches, and outlines how future advances may enable the
Titia Rixt Oppewal, Clemens Mayer
wiley   +1 more source

Asymmetric reduction of azirines; a new route to chiral aziridines

, 2002
The first enantioselective reduction of aromatic 2H-azirines yields aziridines in up to 70% ee, using the aminoalcohol[RuCl2(p-cymene)](2) catalyzed asymmetric transfer hydrogenation reaction.
Anderson, P. G., Somfai, Peter,, Roth, P.   +2 more
core   +2 more sources

Neuere Methoden zur Ringerweiterung organischer Verbindungen

CHIMIA, 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

Chiral Pyrazolinylidene Complexes for Asymmetric Catalysis

Chemistry – A European Journal, EarlyView.
The synthesis and application of pyrazolin‐5‐ylidene NHC chiral‐at‐ruthenium catalysts is reported. The strong donating pyrazolin‐5‐ylidene ligands led to highly electron rich ruthenium complexes, which showed excellent catalytic activity and enantioselectivity in the intramolecular aziridination of an alkene.
Felix Möller, Nemrud Demirel, Thomas Krüger, Linus Plohnke, Jennifer Schröder, Sergei I. Ivlev, Eric Meggers   +6 more
wiley   +1 more source

The Neber approach to 2-(Tetrazol-5-yl)-2H-Azirines

, 2014
The synthesis of 2-(tetrazol-5-yl)-2H azirines is reported for the first time. Using the Neber approach, β-ketoxime-1H-tetrazoles were converted into the target 2Hazirines bearing phenyl, furan-2-yl, thiophen-2-yl, or pyrrol-2-yl substituents at C-3.
Gimeno, Lourdes, Melo, Teresa M. V. D. Pinho e, Cardoso, Ana Lúcia, Lemos, A., Palacios, Francisco   +4 more
core   +1 more source

Methyl (1aRS,7aSR)-7-formyl-1a-phenyl-1,1a-dihydroazirino[2,3-b]benzo[e][1,4]thiazine-7a(7H)-carboxylate

Molbank
The first representative of the aziridine-fused benzo[e][1,4]thiazine series was synthesized from methyl 2-bromo-2-phenyl-2H-azirine-2-carboxylate and benzo[d]thiazole in 74% yield.
Ilya P. Filippov, Anastasiya V. Agafonova, Nikolai V. Rostovskii, Mikhail S. Novikov   +3 more
doaj   +1 more source