Results 11 to 20 of about 426,599 (311)

Chemical asymmetric synthesis

open access: yesNature, 1989
Thalidomide comes in two forms: a left-handed compound which is a powerful tranquilizer, and a right-handed version which can disrupt fetal development causing severe handicap. As a necessary consequence of synthetic methods available in the early 1960s the two forms were present in equal proportions in the manufactured drug, with catastrophic ...
Brown, J, Davies, S
openaire   +2 more sources

7-Cyano-15-methoxy[6]helicene through a photochemical pathway and investigation of its chiroptical and photophysical properties

open access: yesComptes Rendus. Chimie, 2021
7-Cyano-15-methoxy[6]helicene was synthesized, in 54% overall yield, through a short photochemical procedure including mild conditions and inexpensive reagents.
Hafedh, Nesrine   +2 more
doaj   +1 more source

Synthesis method of asymmetric gold particles. [PDF]

open access: yes, 2017
Asymmetric particles can exhibit unique properties. However, reported synthesis methods for asymmetric particles hinder their application because these methods have a limited scale and lack the ability to afford particles of varied shapes.
Hahm, Eunil   +3 more
core   +1 more source

Synthesis and investigation on optical and electrochemical properties of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridines

open access: yesBeilstein Journal of Organic Chemistry, 2021
A facile synthesis of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridine derivatives is reported which is based on POCl3-mediated cyclodehydration followed by double Suzuki–Miyaura cross-coupling.
Najeh Tka   +4 more
doaj   +1 more source

Asymmetric Hydrogenation in Water by a Rhodium Complex of Sulfonated 2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl (binap) [PDF]

open access: yes, 1993
The synthesis of sulfonated 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (binap) is reported; a rhodium complex of this ligand is the first to perform asymmetric hydrogenation in neat water with optical yields as high as those obtained in nonaqueous ...
Davis, Mark E., Wan, Kam-to
core   +1 more source

2,4-Bis(arylethynyl)-9-chloro-5,6,7,8-tetrahydroacridines: synthesis and photophysical properties

open access: yesBeilstein Journal of Organic Chemistry, 2021
Acridine derivatives have attracted considerable interest in numerous areas owing to their attractive physical and chemical properties. Herein, starting from readily available anthranilic acid, an efficient synthesis of 2,4-bis(arylethynyl)-9-chloro-5,6 ...
Najeh Tka   +7 more
doaj   +1 more source

Asymmetric synthesis of (−)-naltrexone

open access: yesChemical Science, 2019
The asymmetric synthesis of (−)-naltrexone was achieved by a Rh(i)-catalyzed C–H alkenylation and torquoselective electrocyclization cascade and late-stage C–H hydroxylation.
Sun Dongbang   +2 more
openaire   +3 more sources

In Vivo Nanodetoxication for Acute Uranium Exposure

open access: yesMolecules, 2015
Accidental exposure to uranium is a matter of concern, as U(VI) is nephrotoxic in both human and animal models, and its toxicity is associated to chemical toxicity instead of radioactivity. We synthesized different PAMAM G4 and G5 derivatives in order to
Luis Guzmán   +4 more
doaj   +1 more source

Continuous-Flow Synthesis of the Nucleobase Unit of Remdesivir

open access: yesEngineering, 2023
In this work, the nucleobase unit of the antiviral drug remdesivir, 7-bromopyrrolo[2,1-f][1,2,4]triazin-4-amine, was synthesized through five-step continuous flow.
Yongxing Guo   +5 more
doaj   +1 more source

Synthesis of Solution-Phase Phosphoramidite and Phosphite Ligand Libraries and Their In Situ Screening in the Rhodium-Catalyzed Asymmetric Addition of Arylboronic Acids [PDF]

open access: yes, 2007
Herein, we report the automated parallel synthesis of solution-phase libraries of phosphoramidite ligands for the development of enantioselective catalysts.
Feringa, Ben L.,   +5 more
core   +1 more source

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