Results 131 to 140 of about 1,101 (192)

<i>One-pot</i> dearomatizative telescoped addition of <i>C</i>-nucleophiles to fluorinated 1,2,4-oxadiazoles followed by regioselective <i>N</i>-functionalization.

Org Chem Front
Castiglione D, Amata S, Lauria F, Maranzana A, Baldino S, Prado-Roller A, Castoldi L, Palumbo Piccionello A, Pace V, Comas Iwasita EI.   +9 more
europepmc   +1 more source

Precise construction of spiro stereocenters <i>via</i> enantioselective radical addition through modulating photocatalysis from redox to energy transfer. [PDF]

Chem Sci
Liu F, Guo Y, Lu W, Zhao X, Yin Y, Jiang Z.   +5 more
europepmc   +1 more source

Strained Small Nitrogen Heterocycles‐Azabicyclobutanes and Azirines

ChemistrySelect, 2023
Small ring nitrogen heterocycles, azabicyclobutanes and azirines, were investigated by computational methods in order to address the discrepancy between their regioisomers 1- and 2-azabicyclobutane and 1H- and 2H-azirines.
Anita Rágyanszki, Bela Fiser, Edward Lee-Ruff   +2 more
exaly   +3 more sources

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Carbamoyl Anion Addition to Azirines

Organic Letters, 2021
The addition of carbamoyl anions to azirines affords synthetically useful 2-aziridinyl amide building blocks. The reaction scope was explored with respect to both formamide and azirine, and the addition was found to be highly diastereoselective. A one-pot conversion of a ketoxime to an aziridinyl amide was demonstrated.
Michael J. Kerner, Christian A. Kuttruff, Maxim Chevliakov, Frederic G. Buono, Donghong A. Gao, Mariusz Krawiec, Carl A. Busacca, Chris H. Senanayake, Peter Wipf, Jonathan T. Reeves   +9 more
openaire   +2 more sources

Synthesis of 2-halo-2H-azirines [PDF]

Tetrahedron, 2001
[alpha]-Oxophosphonium ylides react with N-chlorosuccinimide, N-bromosuccinimide and N-iodosuccinimide in the presence of azidotrimethylsilane giving the corresponding haloazidoalkenes which were completely converted to the 2-halo-2H-azirines on heating ...
Ana L Cardoso
exaly   +1 more source

2H-Azirines in medicinal chemistry

Chemistry of Heterocyclic Compounds, 2021
The review presents an analysis of studies published in the period 1971–2020 devoted to examination of the biological activity of natural and synthetic 2H-azirine derivatives, their use for bioconjugation, as well as search for some new synthetic methods of structural modification of azirines with the aim of improving their biological activity.
Pavel А. Sakharov, Mikhail S. Novikov, Nikolai V. Rostovskii   +2 more
openaire   +1 more source

Azirine-Based Synthesis of Alkynylpyrroles

The Journal of Organic Chemistry
A two-step method for the preparation of β-ethynylpyrroles from azirinyl ethynyl ketones by Wittig olefination, followed by FeCl2-catalyzed isomerization, has been developed. Azirines with various substitution patterns of the ring and the triple bond tolerate the reaction conditions of both steps, providing di-, tri-, and tetra-C-substituted β ...
Artur E. Taishev, Ekaterina E. Galenko, Mikhail S. Novikov, Alexander F. Khlebnikov   +3 more
openaire   +2 more sources

Formation of Functionalized 2H-Azirines through PhIO-Mediated Trifluoroethoxylation and Azirination of Enamines

Organic Letters, 2013
A variety of enaminones and enamine carboxylic esters were converted to trifluoroethoxylated 2H-azirines through reactions with PhIO in trifluoroethanol (TFE). The cascade reaction is postulated to proceed via a PhIO-mediated oxidative trifluoroethoxylation and a subsequent azirination of the α-trifluoroethoxylated enamine intermediates.
Xiaoqian, Sun, Youran, Lyu, Daisy, Zhang-Negrerie, Yunfei, Du, Kang, Zhao   +4 more
openaire   +2 more sources

Characterization of Azirine and Its Structural Isomers

The Journal of Physical Chemistry A, 2018
The structures and spectroscopic properties of azirine (C2H3N), a nitrogen-containing three-membered cyclic molecule, and its isomers were studied with state-of-the-art ab initio quantum chemical methods. Azirine is isomeric with methyl cyanide (CH3CN) and methyl isocyanide (CH3NC)-both observed in the star-forming regions of Sgr B2.
Claire E. Dickerson, Partha P. Bera, Timothy J. Lee   +2 more
openaire   +2 more sources

Stereoselective Allylation of Azirines with Allylindium Reagents.

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Tsunehisa Hirashita, Shinya Toumatsu, Yuri Imagawa, Shuki Araki, Jun-ichiro Setsune   +4 more
openaire   +1 more source