Results 51 to 60 of about 9,794 (211)

Synthesis and Antimicrobial Activity of Some New Thiadiazoles, Thioamides, 5-Arylazothiazoles and Pyrimido[4,5-d][1,2,4]triazolo[4,3-a]pyrimidines

Molecules, 2016
A novel series of 1,3,4-thiadiazoles, 5-arylazothiazoles and hexahydropyrimido-[4,5-d][1,2,4]triazolo[4,3-a]pyrimidines were synthesized via reaction of hydrazonoyl halides with each of alkyl carbothioates, carbothioamides and 7-thioxo-5,6,7,8 ...
Abdou O. Abdelhamid, Ibrahim E. El Sayed, Mohamed Z. Hussein, Mangoud M. Mangoud   +3 more
doaj   +1 more source

Synthesis of various fused pyrimidine rings with their pharmacological and antimicrobial evaluation [PDF]

Journal of the Serbian Chemical Society, 2014
Various fused pyrimidine such as furo[2,3-d]pyrimidine, triazolo[1,5-a]pyrimidine, tetrazolo[1,5-a]pyrimidine were synthesized from the reactions of thioxopyrimidine-6(1H)-ones with ethyl chloroacetate (under different reaction conditions ...
Mounir Salem A., Marzouk Magda I., Mahmoud Naglaa F.   +2 more
doaj   +1 more source

Ein Ruthenium‐(Ph‐BPE) Katalysator für die asymmetrische Alkinylierung von Fluoral: Enantioselektion aus einem von 12 fluxionalen Komplexen mit rutheniumzentrierter Stereogenität

Angewandte Chemie, EarlyView.
Dies beschreibt die ersten enantioselektiven Alkinylierungen wässrigen Fluorals. Diese Prozesse werden durch einen Iodid‐gebundenen Ruthenium‐(Ph‐BPE)‐Komplex katalysiert, welcher als oktaedrischer Metallkomplex in 12 verschiedenen stereoisomeren Formen vorliegen kann.
Weijia Shen, Sebastian Höthker, Colin E. Hayter, Nicholas K. Bowers, Andrea Pellegrini, Stefan Grimme, Michael J. Krische   +6 more
wiley   +1 more source

Utility of 3-Acetyl-6-bromo-2H-chromen-2-one for the Synthesis of New Heterocycles as Potential Antiproliferative Agents

Molecules, 2015
Coumarin derivatives containing pyrazolo[1,5-a]pyrimidine, tetrazolo[1,5-a]pyrimidine, imidazo[1,2-a]pyrimidine, pyrazolo[3,4-d]pyrimidine, 1,3,4-thiadiazoles and thiazoles were synthesized from 6-bromo-3-(3-(dimethylamino)acryloyl)-2H-chromen-2-one ...
Sobhi M. Gomha, Yasser H. Zaki, Abdou O. Abdelhamid   +2 more
doaj   +1 more source

Late‐Stage Functionalization of Peptides on the Solid Phase

Angewandte Chemie International Edition, EarlyView.
Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner, Truc Lam Pham, Franziska Thomas   +2 more
wiley   +1 more source

Synthesis and Cytotoxicity Evaluation of Some Novel Thiazoles, Thiadiazoles, and Pyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidin-5(1H)-ones Incorporating Triazole Moiety

Molecules, 2015
Reactions of hydrazonoyl halides and each of methyl 2-(1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)ethylidene)hydrazine-1-carbodithioate and 2-(1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)ethylidene)hydrazine-1-carbothioamide afforded 2-(1-(5-methyl-1 ...
Sobhi M. Gomha, Sayed A. Ahmed, Abdou O. Abdelhamid   +2 more
doaj   +1 more source

Neuere heterocyclische Zwischenprodukte für die Azokupplung durch Cyclisierung von Nitrilen

CHIMIA, 1980
Two types of syntheses of heteroaromatic amines by cyclization of nitriles are described. It is dealt with the cyclization of nitriles by elemental sulphur yielding thiophenes and thiazoles and with some reactions of the resulting 2-amino-thiophene-3 ...
Karl Gewald
doaj   +1 more source

RESEARCH REGARDING THE POTENTIAL ACTIVITY OF SOME HETEROCYCLIC COMPOUNDS ON PLANTS GROWTH AND DEVELOPMENT

Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2017
It is well known that growth and morphogenesis of plant tissue cultures can be improved by small amounts of some organic compounds. Heterocyclic compounds such as chromanones and thiazoles derivatives, valuable because of their potential biological ...
OANA-IRINA PATRICIU , ŞTEFAN CIOBANU , DANIELA NICUŢĂ, LUMINITA GROSU, MIRELA SUCEVEANU , IRINA-CLAUDIA ALEXA, ADRIANA LUMINITA FÎNARU   +6 more
doaj  

Green synthesis of novel coumarin derivatives via grinding approach and their antimicrobial evaluation

Green Chemistry Letters and Reviews
Herein, a rapid, clean, less expensive and environmentally friendly route to a novel series of coumarins bearing thiazoles or 1,3,4-thiadiazoles was developed via grinding method under solvent conditions.
Anhar Abdel-Aziem
doaj   +1 more source

N-Propargylamines: versatile building blocks in the construction of thiazole cores

Beilstein Journal of Organic Chemistry, 2017
Thiazoles and their hydrogenated analogues are not only key structural units in a wide variety of natural products but they also constitute important building blocks in medicinal chemistry.
S. Arshadi, E. Vessally, L. Edjlali, R. Hosseinzadeh-Khanmiri, E. Ghorbani-Kalhor   +4 more
doaj   +1 more source