Results 51 to 60 of about 1,101 (192)

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

, 2016
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 2H-azirines bearing phenyl, furan-2-yl, thiophen-2-yl, or pyrrol-2-yl substituents at C-3 ...
Teresa M. V. D. Pinho e Melo (1724932), Ana Lúcia Cardoso (1933843), Américo Lemos (1724944), Francisco Palacios (1447132), Lourdes Gimeno (1933846)   +4 more
core   +1 more source

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

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

Pyridonderivate aus 3-Amino-2H-azirinen und Cyclopropenonen

CHIMIA, 1978
Reaction of the 3-dimethylamino-2H-azirines 1a and 1b with diphenylcyclopropenone (2a) in ether or acetonitrile leads to the 2-dimethylamino-5,6-diphenyl-4(3H)-pyridones 3a and 3b in 70 and 80% yield, respectively. The structure of these 1:1-adducts has
Stanislav Chaloupka, Heinz Heimgartner
doaj   +1 more source

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

Ruthenium-Catalyzed [3+2] Cycloaddition of 2H-Azirines with Alkynes: Access to Polysubstituted Pyrroles

, 2016
A ruthenium-catalyzed intermolecular [3 + 2] cycloaddition of 2H-azirines and activated alkynes is reported, which provides polysubstituted pyrroles in moderate to good yields.
Wan, Boshun, Yan, Hao, Li, Xincheng, Li, Tengfei, Wang, Chunxiang   +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

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.
Suárez, Ernesto, Rodríguez Morales, María S., Suarez, E., Alonso-Cruz, Carmen R., Kennedy, A.R., Rodriguez, M.S., Kennedy, Alan R., Alonso-Cruz, C.R.   +7 more
core   +1 more source

Push–Pull Ynamines and Push–Pull Ynamides: Synthesis, Structure, Reactivity, and Application

European Journal of Organic Chemistry, Volume 29, Issue 19, 22 May 2026.
Push–pull ynamines and push–pull ynamides, which carry an EWG and an amino or amido group as EDG, are highly interesting classes of EDG‐EWG alkynes that have been intensively studied due to their exceptional reactivity. In this review, the synthesis, structure, reactivity, and application of push–pull ynamines, push–pull ynecarbamates, push–pull ...
Hans‐Joachim Gais
wiley   +1 more source

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