scholarly journals Synthesis and Antimalarial Activity of 7-Chloro-4-(4-(2-(Oxo, Hydroxyl & Fluoro-2-1 (4-Phenyl)Ethyl)Piperazin-1-yl)Quinoline Derivatives

2021 ◽  
Vol 12 (6) ◽  
pp. 7957-7971
Keyword(s):  
Nucleophilic Addition ◽  
Addition Reaction ◽  
Antimalarial Activity ◽  
Quinoline Derivatives ◽  
Good Activity ◽  
Standard Drug ◽  
Falciparum Strain ◽  
Phenacyl Bromides ◽  
Nucleophilic Addition Reaction

Since these days, microbes are resistant to the drugs available in the market, which has caused an alarming impact on society. 18 compounds in a series of 7-chloro-4-(piperazin-1-yl)quinoline derivatives were synthesized by nucleophilic addition reaction of piperazine with 4,7-dichloroquinoline followed by phenacyl bromides addition to heteroaryl piperazine and then reduction and fluorination. All 18 compounds were evaluated in vitro for their antimalarial activity against plasmodium falciparum strain. Although 12 compounds showed good activity, compound 3c was found to be more potent than standard drug Quinine having MIC 0.18 μg/ mL. On the other hand, 3d, 3e, 5a, and 5f were found to be equipotent (MIC 0.26 μg/ mL) to the standard drug.

Layer by layer assembled functionalized graphene oxide-based polymer brushes for superlubricity on steel-steel tribocontact

Soft Matter ◽  
2021 ◽  
Author(s):  
Suprakash Samanta ◽  
Rashmi Ranjan Sahoo
Keyword(s):  
Graphene Oxide ◽  
Nucleophilic Addition ◽  
Polymer Brushes ◽  
Addition Reaction ◽  
Layer By Layer ◽  
Functionalized Graphene ◽  
Covalent Functionalization ◽  
Functionalized Graphene Oxide ◽  
Nucleophilic Addition Reaction ◽  
Branched Polyethylenimine

Present study demonstrates a simple and multistep approach for the preparation of covalent functionalization of chemically prepared graphene oxide (GO) by branched polyethylenimine (PEI) through nucleophilic addition reaction to prepare...

scholarly journals Catalytic Enantioselective Synthesis of 4-Amino-1,2,3,4-tetrahydropyridine Derivatives from Intramolecular Nucleophilic Addition Reaction of Tertiary Enamides

Synlett ◽  
2018 ◽  
Vol 30 (04) ◽  
pp. 483-487 ◽  
Author(s):  
Shuo Tong ◽  
Mei-Xiang Wang
Keyword(s):  
Phosphoric Acid ◽  
Asymmetric Catalysis ◽  
Nucleophilic Addition ◽  
Addition Reaction ◽  
Enantioselective Synthesis ◽  
Chiral Phosphoric Acid ◽  
Substrate Engineering ◽  
Nucleophilic Addition Reaction ◽  
Engineering Strategy ◽  
Acid Catalyzed

A general and efficient method for the synthesis of highly enantiopure 4-amino-1,2,3,4-tetradydropyridine derivatives based on chiral phosphoric acid catalyzed intramolecular nucleophilic addition of tertiary enamides to imines has been developed. We have also demonstrated a substrate engineering strategy to significantly improve the enantioselectivity of asymmetric catalysis

Nucleophilic addition reaction of aromatic compounds with α-chloroglycidates in the presence of Lewis acid

Tetrahedron ◽  
2003 ◽  
Vol 59 (10) ◽  
pp. 1781-1790 ◽  
Author(s):  
Jing-Rong Lin ◽  
Aidar T Gubaidullin ◽  
Vakhid A Mamedov ◽  
Sadao Tsuboi
Keyword(s):  
Lewis Acid ◽  
Aromatic Compounds ◽  
Nucleophilic Addition ◽  
Addition Reaction ◽  
Nucleophilic Addition Reaction

Total Synthesis of (–)-Alstofolinine A: Selected Furan Oxidation/ Cyclization Cascade

Synlett ◽  
2019 ◽  
Vol 31 (01) ◽  
pp. 7-12 ◽  
Author(s):  
Ye Zhang ◽  
Lei Zhang ◽  
Xiangbing Qi
Keyword(s):  
Total Synthesis ◽  
Common Core ◽  
Nucleophilic Addition ◽  
Addition Reaction ◽  
Indole Alkaloids ◽  
Indole Alkaloid ◽  
Asymmetric Total Synthesis ◽  
Ring Systems ◽  
Synthetic Strategy ◽  
Nucleophilic Addition Reaction

Indole-fused tetracyclic ring systems containing nitrogen atoms are common core skeletons of many indole alkaloids such as sarpagine, macroline, and ajmaline. Efficient and stereoselective construction of these ring systems can promote the development of the corresponding alkaloid syntheses. In this article, we briefly summarize our current progress toward the application of the aza-Achmatowicz reaction and indole nucleophilic addition reaction cascade for the first asymmetric total synthesis of the macroline-type indole alkaloid (–)-Alstofolinine A. Our synthetic strategy is based on furan oxidation/rearrangement and proceeds from easily accessible materials such as indole and furan derivatives.

scholarly journals Hydrosilylation of Reactive Quantum Dots and Siloxanes for Stable Quantum Dot Films

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 905
Author(s):  
Changmin Lee ◽  
Eunhee Nam ◽  
Woosuk Lee ◽  
Heeyeop Chae
Keyword(s):  
Quantum Dots ◽  
Oleic Acid ◽  
Nucleophilic Addition ◽  
Addition Reaction ◽  
Light Emitting Diode ◽  
Molecular Structures ◽  
One Pot ◽  
Nucleophilic Addition Reaction ◽  
The Stability ◽  
Photo Stability

The reactive acrylate-terminated CdZnSeS/ZnS quantum dots (QDs) were designed and prepared by the effective synthetic route to bond with a siloxane matrix via hydrosilylation. The conventional QD with oleic acid ligands does not have any reactivity, so the QDs were functionalized to assign reactivity for the QDs by the ligand modification of two step reactions. The oleic acid of the QDs was exchanged for hydroxyl-terminated ligands as an intermediate product by one-pot reaction. The hydroxyl-terminated QDs and acrylate-containing isocyanates were combined by nucleophilic addition reaction with forming urethane bonds and terminal acrylate groups. No degradation in quantum yield was observed after ligand exchange, nor following the nucleophilic addition reaction. The modification reactions of ligands were quantitatively controlled and their molecular structures were precisely confirmed by FT-IR and 1H-NMR. The QDs with acrylate ligands were then reacted with hydride-terminated polydimethylsiloxane (H-PDMS) to form a QD-siloxane matrix by thermal curing via hydro-silylation for the first time. The covalent bonding between the QDs and the siloxane matrix led to improvements in the stability against oxygen and moisture. Stability at 85 °C and 85% relative humidity (RH) were both improved by 22% for the QD-connected siloxane QD films compared with the corresponding values for conventional QD-embedded poly(methylmethacrylate) (PMMA) films. The photo-stability of the QD film after 26 h under a blue light-emitting diode (LED) was also improved by 45% in comparison with those of conventional QD-embedded PMMA films.

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