Results 91 to 100 of about 16,682 (222)

Construction of spirocycles containing highly substituted pyrroli-dine and 1-indanone motifs with spiro quaternary stereogenic centers via 1,3-dipolar cycloaddition of 2-alkylidene-1-indanone and azomethine ylides promoted by simple imidazolium salts [PDF]

, 2015
The 1,3-dipolar cycloaddition of 2-alkylidene-1-indanone with azomethine ylides has been developed successfully promoted by simple imidazolium salts to construct a variety of spirocycles containing highly substituted pyrrolidines efficiently, affording ...
Hu, Wei-Qiang, Dou, Pei-Hao, Fu, Ji-Ya, Cui, Yan-Su, Wu, Zhi-Jun, Liu, Yong, Zhang, Chuan-Bao, Niu, Song-Yang, Fu, JY (reprint author), Henan Univ, Coll Chem & Chem Engn, Henan Engn Lab Flame Retardant & Funct Mat, Inst Fine Chem & Engn, Kaifeng 475004, Henan, Peoples R China.   +8 more
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A Diastereoselective Synthesis of Dispiro[oxindole-cyclohexanone]pyrrolidines by 1,3-Dipolar Cycloaddition

Molecules, 2017
For the first time, arylmethylidene cyclohexanones that are non-symmetrical due to the presence of peripheral substituents were studied in 1,3-dipolar cycloaddition reactions.
Alexander Anis’kov, Irina Klochkova, Roman Tumskiy, Alevtina Yegorova   +3 more
doaj   +1 more source

Synthesis of Different Heterocyclic Compounds of Pharmaceutical Relevance [PDF]

This thesis describes the synthesis of different cyclic imines and the exploration of their reactivity with cyclopropenones and 1,3-dipoles,as well as an investigation of the chemistry of the products.
Khan, Musharraf Naveed
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Estudo das reações do acido de meldrum a bases de Schiff aromaticas [PDF]

, 1997
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciencias Fisicas e MatematicasOs compostos imínicos possuem reatividade semelhante a dos compostos carbonílicos, ambos apresentam ligações heteropolares insaturadas.
Rosa, Flavia Aparecida Fernandes da
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Controlling Asymmetric Remote and Cascade 1,3-Dipolar Cycloaddition Reactions by Organocatalysis [PDF]

, 2016
The regio- and stereoselective control of cycloaddition reactions to polyconjugated systems has been demonstrated by applying asymmetric organocatalysis.
Stefania Vergura (2745067), Karl Anker Jørgensen (1287900), Danny Kaare Bech Jørgensen (2745064), Alicia Monleón (2745073), Pernille H. Poulsen (2745070)   +4 more
core   +1 more source

Efficient synthesis of 1,3-diaryl-4-halo-1H-pyrazoles from 3-arylsydnones and 2-aryl-1,1-dihalo-1-alkenes

Beilstein Journal of Organic Chemistry, 2011
An efficient synthesis of 1,3-diaryl-4-halo-1H-pyrazoles was achieved. The synthesis involves the [3 + 2] dipolar cycloaddition of 3-arylsydnones and 2-aryl-1,1-dihalo-1-alkenes. The process proceeds smoothly in moderate to excellent yields. 1,3-Diaryl-4-
Yiwen Yang, Chunxiang Kuang, Hui Jin, Qing Yang, Zhongkui Zhang   +4 more
doaj   +1 more source

Metal-catalyzed 1,3-dipolar cycloaddition reactions of nitrile oxides [PDF]

, 2018
In the present review advances in the metal-catalyzed 1,3-dipolar cycloaddition reactions of nitrile oxides, mainly in the last decade, will be presented and discussed. An overview on the structure, preparation, dimerization and related reactions as well
Roscales García, Silvia, Silvia Roscales, Joaquín Plumet, Plumet, Joaquín   +3 more
core   +2 more sources

The Reactivity of Addends in the 1,3-Dipolar Cycloaddition Reaction [PDF]

, 1984
The influence of donor-acceptor interactions and localisation energies on the reactivity of addends in the 1,3-dipolar cycloaddition reaction is examined.
Samuilov Y., Konovalov A.
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Synthesis of oxetane/azetidine containing spirocycles via the 1,3-dipolar cycloaddition reaction [PDF]

, 2016
Silver catalyzed 1,3-dipolar cycloaddition reactions between methyl 2-(oxetane/azetidine-3 ylidene) acetate as dipolarophiles and imines derived from –amino acid methyl esters, 2-aminomethyl pyridine and 2-aminomethyl pyrazine afforded oxetane/azetidine ...
Proud, M, Jones, B, Sridharan, V
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Alkylation and 1,3-Dipolar Cycloaddition of 6-Styryl-4,5-dihydro-2H-pyridazin-3-one: Synthesis of Novel N-Substituted Pyridazinones and Triazolo[4,3-b]pyridazinones

Journal of Chemistry, 2013
Some new N-substituted pyridazinones and triazolo[4,3-b]pyridazinones were synthesized, respectively, by simple alkylation and 1,3-dipolar cycloaddition of pyridazin-3-one with nitrile imines.
Souad Mojahidi, Hanan Sekkak, El Mostapha Rakib, Maria G. P. M. S. Neves, Maria A. F. Faustino, José A. S. Cavaleiro, Hafid Zouihri   +6 more
doaj   +1 more source