Results 31 to 40 of about 116,777 (208)

Visible-Light-Promoted Trifluoromethylthiolation and Trifluoromethylselenolation of 1,4-Dihydropyridines

, 2022
We report a metal-free trifluoromethylthiolation and trifluoromethylselenolation of 1,4-dihydropyridines with S-(trifluoromethyl) 4-methylbenzenesulfonothioate and Se-(trifluoromethyl) 4-methylbenzenesulfonoselenoate under visible light irradiation. This
Enxue Chen (14303621), Xia Zhao (215170), Kui Lu (1643149), Xiwen Shan, Xiaoxing Wang (14912), Juyan Liu, Xia Zhao, Kui Lu, Xiwen Shan (14303618), Xiaoxing Wang, Enxue Chen, Juyan Liu (382746)   +11 more
core   +1 more source

New synthetic method for the synthesis of 1,4-dihydropyridine using aminated multiwalled carbon nanotubes as high efficient catalyst and investigation of their antimicrobial properties

Journal of Saudi Chemical Society, 2018
Synthesis of 1,4-dihydropyridines in the presence of aminated multiwalled carbon nanotubes and investigation into their antimicrobial properties were carried out.Amino functionalized carbon nanotubes were prepared through a facile, clean and safe ...
Roya Mahinpour, Leila Moradi, Zohreh Zahraei, Nafiseh Pahlevanzadeh   +3 more
doaj   +1 more source

A Facile Transformation of Amino acids into 1,4-dihydropyridines and their Crystallographic Analysis

, 2021
A facile transformation of amino acids into substituted 1,4-dihydropyridines (1,4-DHP) is reported. The natural amino acids were converted into gamma-amino beta-keto esters and used for the synthesis of substituted 1,4-dihydropyridines from the ...
Anindita, Adak, Puneeth , Koppal
core   +1 more source

Synthesis and anticholinesterase activity of a novel series of acetazolamide condensed 1,4-dihydropyridines

Carbon Resources Conversion, 2019
A novel Acetazolamide condensed 1, 4-dihydropyridines was set up by treating of N-(5-acetamido-1, 3, 4-thiadiazol-2-ylsulfonyl)-3-oxobutanamide with an aryl aldehyde and 25–30% alkali with sight amount of barium nitrate as a catalyst. Confirmation of the
Mudduluru Niranjan Babu, Karthikeyan Elumalai, Sivaneswari Srinivasan, Kalpana Eluri, Manogaran Elumalai, Srinivasan Sivannan   +5 more
doaj   +1 more source

SYNTHESIS AND PRELIMINARY ALKYLATING ACTIVITIES OF CERTAIN NEW 1,4-DIHYDROPYRIDINES, PYRIDINIUM SALTS AND 2,7-DIAZABICYCLO [4.1.0] HEPT-3-ENES [PDF]

Bulletin of Pharmaceutical Sciences. Assiut University, 1993
3-Substituted-1-{2-chloro- or [2-bis (2-chloroethyl)amino]}ethyl-1,4-dihydropyridines 3 and 6 were prepared by reduction of the corresponding pyridinium chlorides 2 and 5 with sodium dithionite in alkaline medium.
Nawal El-Koussi, Mahmoud El-Gendy, Abdel-Alim Abdel-Alim, Hassan Farag   +3 more
doaj   +1 more source

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

FEBS 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

Synthesis new fluorinated 4-phenyl-1,4-dihydropyridine derivatives, as perspective antiarrhythmic and antihypertensive drugs

Results in Chemistry, 2023
Derivatives of dihydropyridines are promising agents for research, as they have high biological activity. Their low toxicity and polytargeted properties make it possible to create new derivatives and identify new biological activity. As part of this work,
Arkadiy Bryzgalov, Tatiana Tolstikova, Borislav Koshcheev, Alexander Maksimov   +3 more
doaj   +1 more source

Synthesis of Monofluoroalkenes through Visible-Light-Promoted Defluorinative Alkylation of gem-Difluoroalkenes with 4‑Alkyl-1,4-dihydropyridines

, 2020
In this study, a facile and efficient method to synthesize monofluoroalkenes by photoredox catalytic defluorinative alkylation of gem-difluoroalkenes with 4-alkyl-1,4-dihydropyridines under mild conditions (room temperature) is described.
Jing Sun (141206), He Wang (250350), Jing-Yun Wang (5645627), Ming-Dong Zhou (2362303), Qi-Sheng Gao (8364261), Hai-Wu Du (8364258), Zhaoqing Xu (1339896)   +6 more
core   +1 more source

A Microwave-Assisted Bismuth Nitrate-Catalyzed Unique Route Toward 1,4-Dihydropyridines

Molecules, 2012
The classical Hantzsch reaction is one of the simplest and most economical methods for the synthesis of biologically important and pharmacologically useful 1,4-dihydropyridine derivatives.
Bimal K. Banik, Stephanie Maldonado, Debasish Bandyopadhyay   +2 more
doaj   +1 more source

Rearrangement of o-Nitrobenzaldehyde in the Hantzsch Reaction

Molecules, 2001
The reaction of 5-hydroxy-2-nitrobenzaldehyde with ethyl acetoacetate in ammonia gave the two expected isomeric 1,4- and 1,2-dihydropyridines resulting from the normal Hantzsch reaction.
R. Martínez, R. López- Castañares, A. Velázquez, A. Ramírez, I. Martínez, I. Menconi, H. Santillán, E. Angeles   +7 more
doaj   +1 more source