Results 111 to 120 of about 25,619 (230)

Convenient Synthesis and Biological Evaluation of Modafinil Derivatives: Benzhydrylsulfanyl and Benzhydrylsulfinyl [1,2,3]triazol-4-yl-methyl Esters

Molecules, 2011
Simple synthesis and biological activities of modafinil derivatives are described. The key reactions include condensation of acid and propargyl alcohol, subsequent 1,3-dipolar cycloaddition reaction of alkynes and (3-azido-propyl)cyclohexane or (4-azido ...
Seikwan Oh, Mankil Jung, Eunyoung Lim, Jee-Young Son, Yeonju Lee, Jae-Chul Jung   +5 more
doaj   +1 more source

1,3-Dipolar cycloaddition reactions of tetra- and tripyridylporphyrins [PDF]

, 2020
1,3-dipolarna cikloadicija jedna je od najvažnijih metoda u organskoj kemiji za sintezu peteročlanih prstena. Ovdje dolazi do reakcije između vrste zwitterionske rezonantne strukture, odnosno 1,3-dipola i spoja koji u svojoj strukturi ima višestruku vezu,
Vincetić, Magdalena
core  

REACTIVITY OF N-SUBSTITUTED p-BENZO AND p-NAPHTHOQUINONEIMINE N-OXIDES TOWARD DIPOLAROPHILES [PDF]

Journal of Sciences, Islamic Republic of Iran, 1990
The dipolar cycloaddition reactivity of N-(1-naphthy1)-1,4- benzoquinoneimine N-oxide and N-phenyl-1,4- naphthoquinoneimine Noxide are investigated, The latter gives the expected adducts with common dipolarophiles such as acrylonitryle, methyl ...
doaj  

Synthesis of Trifluoromethylated Spiroisoxazolones via a [3+2] Cycloaddition of Nitrile Imines and Unsaturated Isoxazolones

Molecules
A strategy for constructing trifluoromethylated spiroisoxazolones has been developed. This approach relies on the 1,3-dipolar cycloaddition of CF3-substituted nitrile imines, generated in situ from trifluoroacetyl hydrazonoyl bromides and K2CO3, with the
Wei Zhang, Da-Ming Du
doaj   +1 more source

Green Synthesis of Heterocyclic Systems by 1,3-Dipolar Cycloaddition-Initiated Transformations [PDF]

, 2019
Diastereomerically enriched heterocyclic compounds play a significant role in medicinal chemistry and natural products. 1,3-Dipolar cycloaddition-initiated pot, atom and step economic ( PASE) synthesis is a powerful strategy for the construction of ...
Zhang, Xiaofeng
core  

Design, Synthesis, enzyme inhibitory activity and molecular docking studies of new 1,2,3-triazole linked nucleobases

Results in Chemistry
Thirteen novel 1,2,3-triazole linked nucleobases (5a-m) were designed and efficiently synthesized as potential human enzyme inhibitors. The target compounds were synthesized by using Copper (I)-catalysed Huisgen-Sharpless-Meldal 1,3-dipolar cycloaddition
Aditya Aggarwal, Chanchal Vashisth, Komal Bharti, Neera Raghav, Surender Kumar   +4 more
doaj   +1 more source

Regioselective Synthesis of Some Pyrazole Scaffolds Attached to Benzothiazole and Benzimidazole Moieties

Journal of Chemistry, 2014
Condensation of 2-(benzothiazol-2-yl)acetonitrile (1) or 2-(1-methyl-1H-benzimidazol-2-yl)acetonitrile (2) with thiophene-2-carbaldehyde afforded the corresponding acrylonitrile derivatives 3 or 4, respectively.
Nabila A. Kheder, Yahia N. Mabkhot, Fawzia R. Zahian, Sara S. Mohamed   +3 more
doaj   +1 more source

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
core  

1-3 dipolar cycloadditions of nitrile ylides [PDF]

, 1972
1-3 dipolar cycloaddition is the union of a 1-3 dipole, a-b-c, with a system containing a multiple bond, d-e, to form a five membered ring. In this scheme, center c contains an electron sextet, and concommitant positive charge, while center c contains an
Braff, Steven Paul
core   +1 more source

Transition metal catalyzed 1-3-dipolar cycloaddition of carbethoxycarbene to acrylonitrile [PDF]

Tetrahedron Letters, 1974
Paulissen, R., Moniotte, Ph, Hubert, André J., Teyssié, Philippe   +3 more
openaire   +2 more sources