Results 71 to 80 of about 597,655 (179)

A three-armed cryptand with triazine and pyridine units: synthesis, structure and complexation with polycyclic aromatic compounds

Beilstein Journal of Organic Chemistry, 2018
The aromatic nucleophilic substitution reaction based synthesis of a three-armed cryptand displaying 2,4,6-triphenyl-1,3,5-triazine units as caps and pyridine rings in the bridges, along with NMR, MS and molecular modelling-based structural analysis of ...
Claudia Lar, Adrian Woiczechowski-Pop, Attila Bende, Ioana Georgeta Grosu, Natalia Miklášová, Elena Bogdan, Niculina Daniela Hădade, Anamaria Terec, Ion Grosu   +8 more
doaj   +1 more source

Perhalogenated pyrimidine scaffolds. Reactions of 5-chloro-2,4,6-trifluoropyrimidine with nitrogen centred nucleophiles

Beilstein Journal of Organic Chemistry, 2008
BackgroundHighly functionalised pyrimidine derivatives are of great importance to the life-science industries and there exists a need for efficient synthetic methodology that allows the synthesis of polysubstituted pyrimidine derivatives that are ...
Emma L. Parks, Graham Sandford, John A. Christopher, David D. Miller   +3 more
doaj   +1 more source

Further Successes of the Meisenheimer Model

Applied Sciences, 2012
Our simple Meisenheimer model for predicting the principal site for nucleophilic substitution in aromatic perfluorocarbons is further tested on a series of recently published reactions in liquid ammonia primarily from Malykhin and coworkers.
Jon Baker Baker, Max Muir
doaj   +1 more source

Synthesis of Poly(phenylene oxide) Containing Trifluoromethyl Groups via Selective and Sequential Nucleophilic Aromatic Substitution Reaction

, 2016
Synthesis of Poly(phenylene oxide) Containing Trifluoromethyl Groups via Selective and Sequential Nucleophilic Aromatic Substitution ...
Im Sik Chung (1700767), Sang Youl Kim (1700764), Yun Jun Kim (2155135)   +2 more
core   +1 more source

Palladium-Catalyzed Coupling of Naphthoquinone Triflates with Stannanes. Unprecedented Nucleophilic Aromatic Substitution on a Hydroxynaphthoquinone Triflate

, 2016
Palladium-Catalyzed Coupling of Naphthoquinone Triflates with Stannanes.
Antonio M. Echavarren (1299936), Nuria Tamayo (1854373), Pedro Noheda (3039894), Óscar de Frutos (3039897), Paloma Calle (1925863)   +4 more
core   +1 more source

Nucleophilic Aromatic Substitution Reactions in Water Enabled by Micellar Catalysis

, 2015
Given the huge dependence on dipolar, aprotic solvents such as DMF, DMSO, DMAc, and NMP in nucleophilic aromatic substitution reactions (SNAr), a simple and environmentally friendly alternative is reported. Use of a “benign-by-design” nonionic surfactant,
Fabrice Gallou (1520266), Sean M. Kelly (1520272), Bruce H. Lipshutz (1330881), Nicholas A. Isley (1520275), Roscoe T. H. Linstadt (1520269)   +4 more
core   +1 more source

Exploring the Orthogonal Chemoselectivity of 2,4,6-Trichloro-1,3,5-Triazine (TCT) as a Trifunctional Linker With Different Nucleophiles: Rules of the Game

Frontiers in Chemistry, 2018
The study involves exploring the three orthogonal sites for aromatic nucleophilic substitution in cyanuric chloride (TCT). The preferential order of incorporation of different nucleophiles (such as alcohol, thiol, and amine) was addressed both ...
Anamika Sharma, Anamika Sharma, Ayman El-Faham, Ayman El-Faham, Beatriz G. de la Torre, Fernando Albericio, Fernando Albericio, Fernando Albericio, Fernando Albericio   +8 more
doaj   +1 more source

Synthesis of organosoluble and light-colored cardo polyimides via aromatic nucleophilic substitution polymerization

, 2015
A series of cardo polyimides (PIs) containing large-volume cardo groups were prepared via aromatic nucleophilic substitution polymerization of bisphenols and bis(fluorophthalimide)s.
Mushtaq, Nafeesa, Chen, Guofei, Liu, Jiangtao, Fang, Xingzhong   +3 more
core  

Utilizing the σ-complex stability for quantifying reactivity in nucleophilic substitution of aromatic fluorides

Beilstein Journal of Organic Chemistry, 2013
A computational approach using density functional theory to compute the energies of the possible σ-complex reaction intermediates, the “σ-complex approach”, has been shown to be very useful in predicting regioselectivity, in electrophilic as well as ...
Magnus Liljenberg, Tore Brinck, Tobias Rein, Mats Svensson   +3 more
doaj   +1 more source

Unusual nucleophilic versus electrophilic aromatic substitution on nitroanilines

, 2000
The reaction of the regioisomeric nitroanilines with KI and HNOs/bentonite system using microwave energy in solvent-free conditions is reported. In accordance with the obtained results, an unusual competence between nucleophilic aromatic substitution ...
Aguilar-Pacheco, R, Penieres-Carrillo, G, Gutierrez-Perez, R, Baldovino-Pantaleon, O, Miranda-Ruvalcaba, R, Alvarez-Toledano, C   +5 more
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