Results 81 to 90 of about 40,681 (241)

Experimental study of local anesthetic and antiarrhythmic activities of fluorinated ethynylpiperidine derivatives [PDF]

open access: yesBrazilian Journal of Medical and Biological Research
The chemical structure of piperidine has a unique ability to combine with other molecular fragments. This fact makes it possible to actively use it as an effective basis for the creation of new drug-like substances.
E.M. Satbayeva   +10 more
doaj   +1 more source

Efficacy of different dose of dexmedetomidine combined with remifentanil in colonoscopy: a randomized controlled trial

open access: yesBMC Anesthesiology, 2020
Background Dexmedetomidine has advantages during colonoscopy as it allows the patient to cooperate during the procedure. Few studies examined the dexmedetomidine-remifentanil combination.
Li Jia   +5 more
doaj   +1 more source

Development of a [3+3] Cycloaddition Strategy toward Functionalized Piperidines

open access: yes, 2016
This paper describes a novel route to functionalized piperidines via a formal [3+3] cycloaddition reaction of activated aziridines and palladium−trimethylenemethane (Pd-TMM) complexes.
David A. Price (36138)   +3 more
core   +2 more sources

Asymmetric synthesis of piperidines using the nitro-Mannich reaction [PDF]

open access: yes, 2021
A method for the synthesis of functionalized piperidines containing 3 contiguous stereocentres in the 2-,3- and 4- positions uses a diastereoselective nitro-Mannich to control stereochemistry.
Anderson, JC   +3 more
core  

Structurally simple synthetic 1, 4-disubstituted piperidines with high selectivity for resistant Plasmodium falciparum

open access: yesBMC Pharmacology and Toxicology, 2018
Background Emergence of resistance to artemisinins and some of their combinations in chemotherapy of clinical malaria has intensified the search for novel safe efficacious antimalarial molecules.
Moses N. Ngemenya   +5 more
doaj   +1 more source

Asymmetric Routes to Substituted Piperidines

open access: yes, 1998
An overview of the main asymmetric routes to substituted piperidines is presented. A wide range of synthetic strategies have been developed, because of the ubiquitous nature of the piperidine sub-unit in natural products, and because of the biological ...
Millwood, Paula A.   +2 more
core   +1 more source

Efficient Routes to Chiral 2-Substituted and 2,6-Disubstituted Piperidines

open access: yes, 2016
The syntheses of chiral 2-substituted and 2,6-disubstituted piperidines, and piperidin-2-ylphosphonates, via benzotriazole methodology are ...
Peter J. Steel (1724674)   +3 more
core   +2 more sources

Metalloamination/Cyclization of Zinc(II) Amides Derived from N,N-Dimethylhydrazinoalkenes—Applications for the Direct C-SP2 Functionalization of Aryl and Vinyl Electrophiles

open access: yesInorganics
Treatment of N,N-dimethylhydrazinoalkenes with diethylzinc followed by exposure of the resulting ethylzinc amides to high vacuum drives a Schlenck redistribution metalloamination/cyclization to generate the corresponding bis(organozinc) intermediates in ...
Jérome Lépeule   +2 more
doaj   +1 more source

Prins fluorination cyclisations: Preparation of 4-fluoro-pyran and -piperidine heterocycles

open access: yesBeilstein Journal of Organic Chemistry, 2010
The Prins reaction was investigated using BF3·OEt2 as a Lewis acid. It has been recently demonstrated, that if BF3·OEt2 is used in stoichiometric amounts then these reactions generate fluorinated products where the BF3·OEt2 contributes fluoride ion to ...
Guillaume G. Launay   +2 more
doaj   +1 more source

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