Results 31 to 40 of about 18,004 (163)

Triethylamine-Promoted Oxidative Cyclodimerization of 2H-Azirine-2-carboxylates to Pyrimidine-4,6-dicarboxylates: Experimental and DFT Study

Molecules, 2023
An unprecedented oxidative cyclodimerization reaction of 2H-azirine-2-carboxylates to pyrimidine-4,6-dicarboxylates under heating with triethylamine in air is described. In this reaction, one azirine molecule undergoes formal cleavage across the C-C bond
Timofei N. Zakharov, Pavel A. Sakharov, Mikhail S. Novikov, Alexander F. Khlebnikov, Nikolai V. Rostovskii   +4 more
doaj   +1 more source

Studies toward Total Synthesis of (±)-Caldaphnidine C via One-Pot Sequential Intramolecular Vilsmeier–Haack and Azomethine Ylide 1,3-Dipolar Cycloaddition [PDF]

, 2016
An application of a one-pot sequential Vilsmeier–Haack cyclization and intramolecular azomethine ylide 1,3-dipolar cycloaddition toward the total synthesis of (±)-caldaphnidine C is presented.
Guillaume Bélanger, Guillaume Bélanger (1688284), François Lévesque (2141272), Jonathan Boudreault, Boudreault, Jonathan, François Lévesque, Lévesque, François, Jonathan Boudreault (2141269), Bélanger, Guillaume   +8 more
core   +1 more source

Synthesis of pyrrolo[1,2-a]quinolines by formal 1,3-dipolar cycloaddition reactions of quinolinium salts

Beilstein Journal of Organic Chemistry, 2019
Quinolinium salts, Q+-CH2-CO2Me Br− and Q+-CH2-CONMe2 Br− (where Q = quinoline), were prepared from quinolines. Deprotonation of these salts with triethylamine promoted the reaction of the resulting quinolinium ylides (formally azomethine ylides) with ...
Anthony Choi, Rebecca M. Morley, Iain Coldham   +2 more
doaj   +1 more source

Ethyl 1-benzyl-1,2,3,3a,4,10b-hexahydropyrrolo[2′,3′:3,4]pyrrolo[1,2-a]benzimidazole-2-carboxylate

Acta Crystallographica Section E, 2011
The title molecule, C22H23N3O2, was obtained via an intramolecular cycloaddition of an azomethine ylide and an alkene tethered by a benzimidazole unit. The benzoimidazole unit is essentially planar, with an r.m.s. deviation of 0.0087 Å
Liping Meng, James C. Fettinger, Mark J. Kurth   +2 more
doaj   +1 more source

β-Lactam-Based Azomethine Ylide Reactivity. Expedient Synthesis of Carbapenams and Carbapenems

, 2016
β-Lactam-Based Azomethine Ylide Reactivity.
Timothy Gallagher (1261572), Sarah R. Martel (2999676), Mary F. Mahon (1293876), Richard Wisedale (2999679), Lee D. Hall (2999673), Neil J. Hales (2694514), Robert H. Bradbury (1730791)   +6 more
core   +1 more source

Transient Azomethine-ylides from a Stable Amino-carbene and an Aldiminium Salt

, 2016
Catalytic amounts of a protic reagent such as tert-butyl alcohol promote the isomerization of a stable amino-aryl-carbene into a transient azomethine ylide.
Stéphane Solé (2990865), Karinne Miqueu (1502302), Xavier Cattoën (2494672), Didier Bourissou (1409887), Heinz Gornitzka (1385718), Christian Pradel (1972840), Guy Bertrand (1453126)   +6 more
core   +2 more sources

A new and efficient strategy for non-stabilized azomethine ylide via photoinduced electron transfer (PET) initiated sequential double desilylation

, 1992
A practical approach for generating non-stabilized azomethine ylide by PET initiation is ...
Kumaraswamy, G., Pandey, Ganesh, Lakshmaiah, G.   +2 more
core   +1 more source

Additive-assisted regioselective 1,3-dipolar cycloaddition of azomethine ylides with benzylideneacetone

Beilstein Journal of Organic Chemistry, 2014
1,3-Dipolar cycloadditions of isatins, benzylamine and benzylideneacetones were studied to prepare a series of novel spiropyrrolidine-oxindoles – 4′-acetyl-3′,5′-diarylspiro[indoline-3,2′-pyrrolidin]-2-ones and 3′-acetyl-4′,5′-diarylspiro[indoline-3,2 ...
Chuqin Peng, Jiwei Ren, Jun-An Xiao, Honggang Zhang, Hua Yang, Yiming Luo   +5 more
doaj   +1 more source

A Novel One-Pot Green Synthesis of Dispirooxindolo-pyrrolidines via 1,3-Dipolar Cycloaddition Reactions of Azomethine Ylides

Molecules, 2015
A facile synthesis of dispirooxindolopyrrolidines has been accomplished via a one-pot three component 1,3-dipolar cycloaddition reaction. The reaction of azomethine ylides generated in situ from L-phenylalanine and substituted isatins with a series of ...
Abdulrahman I. Almansour, Natarajan Arumugam, Raju Suresh Kumar, Govindasami Periyasami, Hazem A. Ghabbour, Hoong-Kun Fun   +5 more
doaj   +1 more source

Synthesis and Structure Elucidation of Novel Spirooxindole Linked to Ferrocene and Triazole Systems via [3 + 2] Cycloaddition Reaction

Molecules, 2022
In the present work, a novel heterocyclic hybrid of a spirooxindole system was synthesized via the attachment of ferrocene and triazole motifs into an azomethine ylide by [3 + 2] cycloaddition reaction protocol.
Mezna Saleh Altowyan, Saied M. Soliman, Matti Haukka, Nora Hamad Al-Shaalan, Aminah A. Alkharboush, Assem Barakat   +5 more
doaj   +1 more source