Results 81 to 90 of about 121,691 (212)

Catalytic Asymmetric Synthesis of Both Enantiomers of 4‑Substituted 1,4-Dihydropyridines with the Use of Bifunctional Thiourea-Ammonium Salts Bearing Different Counterions

Molecules, 2010
Organoammonium salts composed of a Brønsted acid and an anilinothiourea promoted the Michael addition of β-keto esters and α,β-unsaturated aldehydes in the presence of primary amines to give functionalized 1,4-dihydropyridines enantioselectively.
Kohzo Yoshida, Tsubasa Inokuma, Kiyosei Takasu, Yoshiji Takemoto   +3 more
doaj   +1 more source

Crystal structure of ethyl 2-[9-(5-bromo-2-hydroxyphenyl)-1,8-dioxo-1,2,3,4,5,6,7,8,9,10-decahydroacridin-10-yl]acetate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C23H24BrNO5, the central 1,4-dihydropyridine ring of the 1,2,3,4,5,6,7,8,9,10-decahydroacridine ring system adopts a half-chair conformation. The two cyclohexene rings fused to the central ring both have a twisted-boat conformation.
Shaaban K. Mohamed, Mehmet Akkurt, Jerry P. Jasinski, Antar A. Abdelhamid, Asmaa H. Tamam, Mustafa R. Albayati   +5 more
doaj   +1 more source

Use of pyridinium ionic liquids as catalysts for the synthesis of 3,5-bis(dodecyloxycarbonyl)-1,4-dihydropyridine derivative [PDF]

, 2010
The synthesis of cationic amphiphilic 1,4-dihydropyridine derivative, potential gene delivery agent is achieved via an efficient multi-step sequence.
Kore Kintija, Brigita Cekavicus, Sobolev Arkadij, Pajuste, Karlis, Plotniece, Aiva, Kaldre, Dainis, Dainis Kaldre, Kaldre Dainis, Liva Intenberga, Plotniece Aiva, Aiva Plotniece, Duburs Gunars, Gunars Duburs, Arkadij Sobolev, Sobolev, Arkadij, Duburs, Gunars, Kore, Kintija, Intenberga, Liva, Karlis Pajuste, Pajuste Karlis, Kintija Kore, Intenberga Liva, Cekavicus Brigita, Cekavicus, Brigita   +23 more
core   +1 more source

4-(3,5-Dibromo-4-hydroxyphenyl)-3-butoxycarbonyl-5-ethoxycarbonyl-2-methyl-6-phenyl-1,4-dihydropyridine

Molbank, 2011
One-pot two-step Hantzsch synthesis of 4-(3,5-dibromo-4-hydroxyphenyl)-3- butoxycarbonyl-5-ethoxycarbonyl-2-methyl-6-phenyl-1,4-dihydropyridine under solvent- and catalyst-free conditions promoted with microwave irradiation is presented.
Zhen Wang, Qingjian Liu
doaj   +1 more source

Synthesis and enantioseparation of 1,4-dihydropyridine ring containing condensed heterocycles

, 2012
Sintezētas 1,4-dihidropiridīn-6-merkaptoetiķskābes un 6-metilsulfanil-1,4-dihidropiridīn-3-karbonskābes, pētīta to diastereomēru kristalizācija ar cinhonīnu.
Adlere, Ilze
core  

Effects of dietary 1,4-dihydropyridine on fatty liver of laying hens

浙江大学学报. 农业与生命科学版, 2003
Five hundred and fourty of laying hens at the age of 40 weeks were randomly allotted to 3 groups, each of which included 4 replicates of 45 hens. The groups were fed with a basal corn-soybean diet, supplemented with 0 (control),150 mg/kg, 300 mg/kg 1,4 ...
ZOU Xiao-ting, ZHU Jing-lan, XU Zi-rong
doaj   +1 more source

Experimental, Molecular Docking and Molecular Dynamics Investigation on Newly Synthesized Diethyl 4-(Anthracen-9-yl)-2,6-Dimethyl-1,4-Dihydropyridine-3,5-Dicarboxylate

, 2022
The novel compound diethyl 4-(anthracen-9-yl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (DHPA) was synthesized via the Hantzsch method. The synthesized compound was studied through FT-IR, FT-Raman, UV-Vis and NMR studies were compared with ...
Velraj G (13218114), Karthick R (13218111), Karuppusamy A (13218117), Karthikeyan S (13218120)   +3 more
core   +1 more source

Bromination and Diazo-Coupling of Pyridinethiones; Microwave Assisted Synthesis of Isothiazolopyridine, Pyridothiazine and Pyridothiazepines

Molecules, 2012
Isothiazolopyridines, pyridothiazines and pyridothiazepines are important compounds that possess valuable biological activities. This paper reports on the synthesis of these compounds using both conventional chemical methods and modern microwave ...
Ayman M. S. Youssef, Mohamed E. Azab, Mohamed M. Youssef   +2 more
doaj   +1 more source

Microwave Induced Solvent-free and Catalyst-free Synthesis of 1,4- Dihydropyridine Derivatives using Ammonium Bicarbonate [PDF]

, 2020
One-pot synthesis of 1,4-dihydropyridine derivatives by reacting an aldehyde, a β-ketoester and ammonium bicarbonate in the presence of microwaves without a catalyst under solvent-free conditions is described. Using this green method, 1,4-dihydropyridine
B Vijayakumar
core  

4-Oxo-N-phenyl-1,4-dihydropyridine-3-carboxamide

, 2023
The title compound, C12H10N2O2, shows a nearly planar conformation. The crystal structure is sustained by hydrogen bonds between the NH and the carbonyl O function of the 4-oxo-1,4-dihydropyridine ring of the molecules, forming infinite chains along the ...
Xi Shu, Sihui Long
core   +1 more source