Results 71 to 80 of about 1,276 (179)

When Dark States Become Bright: Vibronic Intensity Borrowing in Triplet 2,6‐Dichloro‐4‐Hydroxyphenylnitrene

Journal of Physical Organic Chemistry, Volume 39, Issue 7, July 2026.
Irradiation of 4‐azido‐2,6‐dichlorophenol in cryogenic matrices generates triplet 2,6‐dichloro‐4‐hydroxyphenylnitrene. Vibronically structured absorption enables extension of a formally forbidden transition into the visible region (up to 500 nm). Analyses based on NICS(1.7)zz, ACID, HOMA, MCI, and spin density reveal magnetically induced ring currents ...
Dharma Raj Joshi, Anindya Borah, Dmitrii Govorov, Trevor Henry, Bruce S. Ault, Anna D. Gudmundsdottir   +5 more
wiley   +1 more source

Reaction of Diphenyl Phosphorochloridate with Amide Enolates: A New and Convenient Synthesis of 2-Monosubstituted 3-(N-Methyl-N-phenylamino)-2H-azirines

, 1992
Reaction of diphenyl phosphorochloridate with amide enolates and subsequent treatment with NaN3 leads to 2-monosubstituted 3-amino-2H-azirines 5 in moderate yields.
Heinz Heimgartner, José M. Villalgordo, Heimgartner, Heinz, Villalgordo, Jose M   +3 more
core   +1 more source

1,1‐Disubstituted Vinylbromides: Versatile Building Blocks for the Synthesis of Nitrogen‐Containing Heterocycles

European Journal of Organic Chemistry, Volume 29, Issue 23, 16 June 2026.
1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer, Jun Fang, Chonghuo Liu, Guillaume Lefèvre, Gérard Guillamot, Phannarath Phansavath, Virginie Ratovelomanana‐Vidal   +6 more
wiley   +1 more source

Chemical Metabolomics: Chemical Biology Tools for Advanced Metabolism Investigations

Angewandte Chemie, Volume 138, Issue 23, 1 June 2026.
The human metabolism has been investigated for several millennia. The metabolome is known for a high complexity due to a large number of different metabolites that are present at different concentrations. Metabolomics has been developed as a field to investigate the entire human metabolome and to elucidate disease development mechanisms.
Alejandro Torregrosa‐Chinillach, Ioanna Tsiara, Wawrzyniec Haberek, Weifeng Lin, Daniel Globisch   +4 more
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

Investigation on the reactivity of α-azidochalcones with carboxylic acids: Formation of α-amido-1,3-diketones and highly substituted 2-(trifluoromethyl)oxazoles

Beilstein Journal of Organic Chemistry, 2015
The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates.
Kandasamy Rajaguru, Arumugam Mariappan, Rajendran Suresh, Periasamy Manivannan, Shanmugam Muthusubramanian   +4 more
doaj   +1 more source

Retraction of “Iron-Catalyzed Three-Component Reaction: Synthesis of Fluoroalkylated 2H‑Azirines”

, 2018
Retraction of “Iron-Catalyzed Three-Component Reaction: Synthesis of Fluoroalkylated 2H ...
Luc Van Meervelt (1501579), Erik V. Van der Eycken (1574857), Nagarajan Ramkumar (1856593)   +2 more
core   +1 more source

Synthesis of Polyhydroxylated 2H-Azirines and 2-Halo-2H-azirines from 3-Azido-2,3-dideoxyhexopyranoses by Alkoxyl Radical Fragmentation

, 2016
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. These β-iodo
María S. Rodríguez (2001400), Ernesto Suárez (1325961), Alan R. Kennedy (1266753), Carmen R. Alonso-Cruz (2435974)   +3 more
core   +2 more sources

Synthesis of Azirinylammonium Salts via Alkylation of DABCO with 2-Halo-2H-azirines

Molbank
Tertiary (2H-azirin-2-yl)ammonium salts were prepared from methyl 2-halo-3-aryl-2H-azirine-2-carboxylates and 1,4-diazabicyclo[2.2.2]octane in very good to excellent yields. Both iodide and bromide salts are stable enough in crystalline form to be stored
Maksim A. Valiarovskii, Alexander V. Vorob’ev, Anastasiya V. Agafonova, Mikhail S. Novikov   +3 more
doaj   +1 more source

A Review on the Photochemistry of 2H-Azirines [PDF]

HETEROCYCLES, 1977
Gilgen, Paul, Heimgartner, Heinz, Schmid, Hans, Hansen, Hans-Jürgen   +3 more
openaire   +2 more sources