Results 51 to 60 of about 18,263,514 (224)

Síntese regiosseletiva de cristais líquidos contendo o heterociclo isoxazol [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaMoléculas com características líquido-cristalinas têm ultimamente atraído um grande interesse por parte de ...
Bryk, Fernando Rebouças
core  

Quantification of the electrophilic reactivities of nitroalkenes [PDF]

, 2012
While a large variety of nucleophiles (N and sN) have been characterized according to eq 1.3, the number of E parameters for electrophiles, and specifically for different classes of Michael acceptors remains relatively small.
Zenz, Ivo
core   +1 more source

Síntese regiosseletiva de cristais líquidos quirais contendo o heterociclo [1,2,3]-triazol [PDF]

, 2005
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaO presente trabalho descreve a síntese de compostos quirais derivados do (S)-(-)-2-metil-1-butanol, contendo o ...
Conte, Gilmar
core  

A Facile One-Pot Construction of Succinimide-Fused Spiro[Pyrrolidine-2,3′-Oxindoles] via 1,3-Dipolar Cycloaddition Involving 3-Amino Oxindoles and Maleimides

Molecules, 2018
Increasing interests have been invested in the development of synthetic strategies toward the construction of spiro[pyrrolidine-2,3′-oxindole], which is the core structural skeleton in some compounds with diverse biological activities.
Lunqiang Jin, Feng Liang
doaj   +1 more source

Synthesis of novel phosphorylated chrysin derivatives by 1, 3-dipolar cycloaddition reaction

Phosphorus, Sulfur, and Silicon and the Related Elements, 2016
Through 1,3-dipolar cycloaddition reaction, 1,4,5-trisubstituted-1,2,3-triazole and phosphate-containing chrysin derivatives were synthesized with high yields. The target compounds were characterized by 1H, 31P, 13C NMR spectroscopy and HRMS.
Shaohua Zhu, Zhang, Yan, Peipei Li, Wenzhu Bi, Xiaolan Chen, Yufen Zhao   +5 more
openaire   +1 more source

An Expedient Regio- and Diastereoselective Synthesis of Hybrid Frameworks with Embedded Spiro[9,10]dihydroanthracene [9,3′]-pyrrolidine and Spiro[oxindole-3,2′-pyrrolidine] Motifs via an Ionic Liquid-Mediated Multicomponent Reaction

Molecules, 2015
A series of hitherto unreported anthracene-embedded dispirooxindoles has been synthesized via a one-pot three-component 1,3-dipolar cycloaddition reaction of an azomethine ylide, generated in situ from the reaction of isatin and sarcosine to 10 ...
Natarajan Arumugam, Abdulrahman I. Almansour, Raju Suresh Kumar, J. Carlos Menéndez, Mujeeb A. Sultan, Usama Karama, Hazem A. Ghabbour, Hoong-Kun Fun   +7 more
doaj   +1 more source

Synthesis of 1,4-naphthoquinone derivatives using 1,3-dipolar cycloaddition and Sonogashira reactions

Orbital: The Electronic Journal of Chemistry, 2010
Naphthoquinones are known according to their important bio-activities, such as their antitumoral and topoisomerase inhibition properties. From 2-azido (3) or 2,3-diacetylene-1,4-naphthoquinone (4) it was possible to obtain triazole derivatives ...
Wilson Silva do Nascimento, Mauro Gomes da Silva, Ronaldo Nascimento de Oliveira, Celso Amorim Câmara   +3 more
doaj  

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

2,2-Diethyl 3,4-dimethyl 5-(4-cyanophenyl)pyrrolidine-2,2,3,4-tetracarboxylate

Acta Crystallographica Section E, 2012
The title compound, C21H24N2O8, was synthesized by a 1,3-dipolar cycloaddition reaction of dimethyl fumarate, diethyl 2-aminomalonate and 4-cyanobenzaldehyde.
Long He
doaj   +1 more source

Asymmetric Synthesis of Tetrahydroisoquinoline Derivatives through 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine Imines with Allyl Alkyl Ketones

Molecules, 2021
A [3 + 2] 1,3-Dipolar cycloaddition of C,N-cyclic azomethine imines with allyl alkyl ketones has been achieved. The reaction proceeds under mild conditions and tolerates a wide range of functional groups. An array of tetrahydroisoquinoline derivatives is
Guipeng Feng, Guoyang Ma, Wenyan Chen, Shaohong Xu, Kaikai Wang, Shaoyan Wang   +5 more
doaj   +1 more source