Results 51 to 60 of about 46,002 (241)

HMPA-Catalyzed Transfer Hydrogenation of 3-Carbonyl Pyridines and Other N-Heteroarenes with Trichlorosilane

open access: yesMolecules, 2019
A method for the HMPA (hexamethylphosphoric triamide)-catalyzed metal-free transfer hydrogenation of pyridines has been developed. The functional group tolerance of the existing reaction conditions provides easy access to various piperidines with ester ...
Yun Fu, Jian Sun
doaj   +1 more source

Organophotocatalysed synthesis of 2-piperidinones in one step via [1 + 2 + 3] strategy

open access: yesNature Communications, 2023
Six-membered N-containing heterocycles, such as 2-piperidinone derivatives, with diverse substitution patterns are widespread in natural products, drug molecules and serve as key precursors for piperidines.
Yi-Dan Du   +6 more
doaj   +1 more source

Silacyclohexanes, Sila(hetero)cyclohexanes and Related Compounds: Structure and Conformational Analysis

open access: yesMolecules, 2020
Conformational analysis of Si-mono- and Si,Si-disubstituted silacyclohexanes as well as their analogues with a heteroatom(s) in the ring is reviewed with the focus on the recent results.
Bagrat A. Shainyan
doaj   +1 more source

Sodium piperidine-1-carbodithioate dihydrate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2011
The asymmetric unit of the title compound, Na(+)·C(6)H(10)NS(2) (-)·2H(2)O, is composed of a sodium cation, a piperidine-dithio-carbamate anion which exhibits positional disorder, and two lattice water mol-ecules. The atoms of the piperidine ring are divided over two sites with occupancy factors of 0.554 (6) and 0.446 (6).
Ana C. Mafud   +1 more
openaire   +3 more sources

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

Stereoselective, nitro-Mannich/lactamisation cascades for the direct synthesis of heavily decorated 5-nitropiperidin-2-ones and related heterocycles

open access: yesBeilstein Journal of Organic Chemistry, 2012
A versatile nitro-Mannich/lactamisation cascade for the direct stereoselective synthesis of heavily decorated 5-nitropiperidin-2-ones and related heterocycles has been developed. A highly enantioenriched substituted 5-nitropiperidin-2-one was synthesised
Pavol Jakubec   +4 more
doaj   +1 more source

Harnessing the Electrophilicity of Keteniminium Ions: A Simple and Straightforward Entry to Tetrahydropyridines and Piperidines from Ynamides

open access: yesAngewandte Chemie, 2016
An efficient, modular and straightforward entry to tetrahydropyridines and piperidines is reported. This reaction is based on a formal intramolecular hydroalkylation of readily available, properly substituted ynamides which, upon simple activation under ...
Morgan Lecomte, G. Evano
semanticscholar   +1 more source

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

N-substituted-piperidines as Novel Anti-alzheimer Agents: Synthesis, antioxidant activity, and molecular docking study

open access: yesFuture Journal of Pharmaceutical Sciences, 2018
Design, synthesis and evaluation of new acetylcholinesterase inhibitors by combining carbamoylpiperidine analogs containing nipecotic acid scaffold were described.
Khairia M. Youssef   +2 more
doaj   +1 more source

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