Results 161 to 170 of about 146,224 (211)

Photoprotection of 1,4-dihydropyridine derivatives by dyes

International Journal of Pharmaceutics, 2005
The possibility of increasing the photochemical stability of nisoldipine by using indigotine and azorubine as photoprotectors has been studied. The course of the photodegradation was monitored by means of UV-vis spectrophotometry and HPLC. Quantitative assessments of the nisoldipine photodegradation included evaluation of the quantum yields and kinetic
Jadwiga, Mielcarek, Włodzimierz, Augustyniak, Paweł, Grobelny, Grazyna, Nowacka   +3 more
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Synthesis of Bis‐1,4‐dihydropyridine Derivatives.

ChemInform, 2005
Abstract A series of bis‐1,4‐dihydropyridine derivatives were synthesized by the reaction of p‐phenylenedialdehyde or m‐phenylenedialdehyde and active methylene compounds.
Songlei Zhu, Shujang Tu, Yuan Gao, Chunbao Miao, Tuanjie Li, Xiaojing Zhang, Fang Fang, Daqing Shi   +7 more
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Cocrystals of diastereoisomers of 1,4-dihydropyridine derivatives

Acta Crystallographica Section C Crystal Structure Communications, 2006
A mixture of the RR/SS and RS/SR diastereoisomeric pairs of methyl 4-(2,4-dichlorophenyl)-2,7-dimethyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate, C 19 H 19 Cl 2 NO 3 , forms cocrystals in which there is one unique molecule in the asymmetric unit, but the molecule displays disorder in the region of the 7-position of the quinoline ring system as
Gunduz, MİYASE GÖZDE, SAFAK, C, SIMSEK, RAHİME, Linden, A   +3 more
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1,4-Dihydropyridines bearing a pharmacophoric fragment of lidoflazine

Bioorganic & Medicinal Chemistry, 1996
A series of 1,4-dihydropyridines bearing a pharmacophoric fragment of lidoflazine was synthesized. The compounds were evaluated for inotropic, chronotropic, and calcium antagonist activities. All compounds behave as inotropic and chronotropic agents, except for compounds 4b, 5a, and 5b, which exhibit a rather weak calcium antagonism in vascular smooth ...
Chiarini A., Rampa A., Budriesi R., Bisi A., Fabbri G., Valenti P.   +5 more
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Reactions of 1,4-dihydropyridines (review)

Chemistry of Heterocyclic Compounds, 1993
The literature published over the period 1986–1990 on the chemical properties (oxidation, addition, substitution, reactions of the functional groups, etc.) of 1,4-dihydropyridines is correlated.
A. Sausin'sh, G. Dubur
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Vicinal diamination of 1,4-dihydropyridines

Chemical Communications, 1998
Electrophilic interaction of iodine with N-alkyl-1,4-dihydropyridines 1 in the presence of secondary amines stereoselectively leads to the corresponding trans-2,3-diamino-1,2,3,4-tetrahydropyridines 2 in satisfactory yields (79–94%); the method allows the synthesis of piperidine, pyrrolidine, morpholine and piperazine derivatives.
Rodolfo Lavilla, Rakesh Kumar, Oscar Coll, Carme Masdeu, Joan Bosch   +4 more
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The alkylation of hantzsch 1,4‐dihydropyridines

Journal of Heterocyclic Chemistry, 1986
AbstractThe reaction of carbanions derived from Hantzsch 1,4‐dihydropyridines with alkyl halides was studied and methods for mono‐ and di‐alkylation were devised.
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1,4-Dihydropyridine

Journal of the American Chemical Society, 1965
Newell C. Cook, James E. Lyons
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Photoelectron spectra of 1,4-dihydropyridine and N-methyl-1,4-dihydropyridine

The Journal of Organic Chemistry, 1974
T. Koenig, H. Longmaid
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Oxidation of 1,4-dihydropyridines

Chemistry of Heterocyclic Compounds, 1973
Ya. R. Uldrikis, A. O. Kumerova, G. Ya. Dubur   +2 more
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