Results 61 to 70 of about 235,743 (243)

3-Methyl 5-[(S)-2-methylbutyl] 4-[2-(difluoromethoxy)phenyl]-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate [PDF]

open access: yes, 2002
The solvatochromic acid-base indicator 1-hexadecyl-4-[(oxocyclohexadienylidene)ethylene]-1,4-dihydropyridine (HOED) was used to determine surface potentials (Y) of micelles formed from methyldiallyl-ndodecylammonium salts containing different counterions
Franssen, M.C.R.   +4 more
core   +6 more sources

Ultrasonic-Assisted Preparation, Characterization, and Use of Novel Biocompatible Core/Shell Fe3O4@GA@Isinglass in the Synthesis of 1,4-Dihydropyridine and 4H-Pyran Derivatives

open access: yesACS Omega, 2018
This work focussed on the synthesis of a new catalytic material isinglass (IG)-based Fe3O4@GA@IG core/shell magnetic nanoparticles and the investigation of its catalytic activity in two important multicomponent reactions.
Elham Pourian   +4 more
semanticscholar   +1 more source

Conformation of 1,4‐dihydropyridine — planar or boat‐like? [PDF]

open access: yesFEBS Letters, 1988
The geometry of the 1,4‐dihydropyridine molecule was completely optimized employing three different ab initio basis sets (6–31 G*, 4–31 G, STO—3G). The most reliable 6–31G* basis set provides a very flat boat conformation which may easily undergo defolding to a planar ring arrangement.
H. Hofmann, CIMIRAGLIA, Renzo
openaire   +2 more sources

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

open access: yesChemistry – A European Journal, EarlyView.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Dimethyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate

open access: yesActa Crystallographica Section E, 2009
In the crystal of the title compound, C11H15NO4, the molecules are linked into sheets by N—H...O and C—H...O hydrogen bonds.
Zhenfeng Zhang   +3 more
doaj   +1 more source

Ethyl 4-oxo-1,4-dihydropyridine-3-carboxylate

open access: yesIUCrData, 2021
The title compound, C8H9NO3, likely generated through hydrolysis and esterification of 3′-carboxy-3-methyl-(1,4′-bipyridin)-1-ium chloride by ethanol, which contained water, has a nearly planar conformation.
Jun Gao, Sihui Long
doaj   +1 more source

Synthesis of bioorganometallic nanomolar-potent CB2agonists containing a ferrocene unit [PDF]

open access: yes, 2016
A small library of ferrocene-containing amides has been synthesized using standard amide coupling chemistry with ferrocenylamine. Ferrocene analogues of known bioactive adamantylamides were shown to be effective cannabinoid receptor (CB1 and CB2 ...
Ahmedi R.   +17 more
core   +3 more sources

Bis‐Furans: A Sustainable Source of Diverse Molecular Architectures

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A concise synthetic route to diverse acyclic and heterocyclic compounds has been developed by combining hetero‐Diels–Alder reactions, DBU‐promoted ring openings, and Lewis base‐catalyzed annulations. Nitrosoalkenes reacted with furan derivatives to form 4a,7a‐dihydro‐4H‐furo[2,3‐e][1,2]oxazines, which underwent DBU‐promoted rearrangements to 6H‐1,2 ...
Ana L. Cardoso   +2 more
wiley   +1 more source

Effects of an antimutagen of 1,4-dihydropyridine series on cell survival and DNA damage in L5178Y murine sublines [PDF]

open access: yes, 2006
In a series of studies it was shown that 1,4-dihydropyridine derivatives (1,4-DHP) show antimutagenic and anticlastogenic properties and accelerate repair of oxidant and ionising radiation generated DNA damage.
Dalivelya, Olga   +1 more
core  

Microwave‐Assisted Organic Syntheses in Deep Eutectic Solvents: A Win‐Win Association for Sustainable Chemistry

open access: yesChemistryOpen, EarlyView.
In organic synthesis, deep eutectic solvents (DES) have demonstrated their ability to be used as reaction media for the development of reactions in line with green chemistry principles. This review presents an overview of microwave‐assisted organic synthesis in DES, highlighting the diversity of uses for these solvents, their role in mechanisms, the ...
Pierre‐Olivier Delaye   +2 more
wiley   +1 more source

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