Results 101 to 110 of about 79,082 (160)

Efficient Approaches to the Design of Six-Membered Polyazacyclic Compounds-Part 1: Aromatic Frameworks. [PDF]

Molecules
Gyrgenova EA, Titova YY, Ivanov AV.
europepmc   +1 more source

Recent trends for chemoselectivity modulation in one-pot organic transformations. [PDF]

RSC Adv
Chaudhary HR, Patel DM.
europepmc   +1 more source

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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.
Mikhail S. Novikov, Nikolai V Rostovskii
exaly   +2 more sources

2H-Azirines as Synthetic Tools in Organic Chemistry

European Journal of Organic Chemistry, 2001
The versatility and the high synthetic potential including the asymmetric syntheses of 2H-azirines as valuable precursors for the preparation of a wide range of polyfunctional acyclic and cyclic compounds, is discussed.
Francisco Palacios, Eduardo Martínez de Marigorta, Ana Maria Ochoa de Retana   +2 more
exaly   +2 more sources

Recent approaches to the synthesis of 2H-azirines

Chemistry of Heterocyclic Compounds, 2019
The most recent (2013–2018) synthetic approaches toward 2H-azirine derivatives are summarized and discussed. This minireview covers the latest examples on the synthesis of 2H-azirines that can be gathered in five distinct categories: the Neber approach, decomposition of vinyl azides, ring contraction of isoxazoles, oxidative cyclization of enamine ...
Ramkumar N., Voskressensky L.G., Sharma U.K., Van Der Eycken E.V.   +3 more
openaire   +3 more sources

Synthesis and Reactivity of 2-Halo-2H-Azirines Towards Nucleophiles [PDF]

Tetrahedron Letters, 2000
Nucleophilic substitution reactions of 2-halo-2H-azirine with potassium phthalimide and aniline allowed the preparation of new substituted 2H-azirines.
Teresa Pinho e Melo, Cláudia S J Lopes
exaly   +2 more sources

Enantioselective addition of organolithium reagents to a 2H-azirine

Tetrahedron: Asymmetry, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Erik Risberg, Peter Somfai
openaire   +1 more source

Electronic structures of vinylazide, vinylnitrene and 2H-azirine. Mechanism of the reaction from vinylazide to 2H-azirine

Tetrahedron, 1984
Abstract The mechanism of the conversion of vinylazides into 2H-azirines is examined by use of ab initio MO calculations. It is ascertained that vinylnitrenes have very weak bonds between the vinylazides and nitrogen molecule parts. It seems to decompose readily into the two fragments.
Tokio Yamabe, Meguru Kaminoyama, Tsutomu Minato, Kenzi Hori, Kazuaki Isomura, Hiroshi Taniguchi   +5 more
openaire   +1 more source

A Simple Green Procedure for the Synthesis of 2H‐Azirines.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Pradeep N.D Singh, Carrie L Carter, Anna D Gudmundsdóttir   +2 more
openaire   +1 more source

Conical intersections and photoreactions of 2H-azirines

Chemical Physics, 2000
Abstract CASSCF calculations were performed on the nπ * - and ππ * -excited states of 2 H -azirine as well as some alkyl-substituted 2 H -azirines. An S 1 /S 0 conical intersection (CI) was located, through which a direct formation of nitrile ylide can occur.
Christian Bornemann, Martin Klessinger
openaire   +1 more source