Results 111 to 120 of about 12,877,669 (294)
E-Journal of Chemistry, 2009 Two biologically active classes of compounds coumarins and triazoles were employed to form the Schiff bases. The synthesized Schiff base viz., 3-aryl-[(1-isocyano-4-methyl-7-hydroxycoumarin)]-5-methyl-1,3,4-triazoline-2-one and its substituents were ...
Kumar Sanjeev S. Lamani +3 more
doaj +1 more source
Zaporožskij Medicinskij Žurnal, 2015 The study of physical and chemical characteristics and establishing patterns of mass spectrometric fragmentation are the actual tasks of modern pharmaceutical science, have both scientific interest and practical importance. Aim.
V. A. Salionov +2 more
doaj +1 more source
, 2018 An unprecedented catalyst-dependent regioselective [3 + 2] cycloaddition of isocyanides with aryl diazonium salts is reported. 1,3-Disubstituted 1,2,4-triazoles were selectively obtained in high yield under Ag(I) catalysis, whereas 1,5-disubstituted 1,2,
Xihe Bi +9 more
core +1 more source
Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2015 The aim of research. Modern drugs must have certain characteristics, such as low toxicity and high efficiency. Special attention should be given to esthers of 2-(1,2,4-triazoles-3-iltio)acetic acids.
V. A. Salionov
doaj +1 more source
Angewandte Chemie, EarlyView.Die Click‐Chemie hat sich von dem Aufbau kovalenter Bindungen hin zum Spalten von Bindungen weiterentwickelt. Hier wird über einen Kaskaden‐Aufbau berichtet, der diese Verfahren kombiniert, um multifunktionale biomolekulare Gerüste in einer modularen Ein‐Topf‐Reaktion aufzubauen.
Markus Staudt +9 more
wiley +1 more source
Pd-catalyzed regioselective C-H chlorination of disubstituted 1,2,3-triazoles
, 2018 This paper mainly studied Pd-catalyzed regioselective chlorination of disubstituted 1,2,3-triazoles directed by the 1,2,3-triazole ring. A series of regioselective chlorinated products were synthesized in 47–86% yields using Pd(OAc)2 as a catalyst and ...
Qiong Mo (5262569) +3 more
core +1 more source
, 2020 A copper-catalyzed decarboxylative cycloaddition of propiolic acids, azides, and arylboronic acids is described. The present reaction provides an efficient and convenient method for the synthesis of various fully substituted 1,2,3-triazoles from readily ...
Ya-Min Li +13 more
core +1 more source
Regioselective synthesis of 4-fluoro-1,5-substituted-1,2,3-triazoles from synthetic surrogates of 1-fluoroalkynes [PDF]
, 2019 Here, we show that 1-fluoronitroalkenes can serve as synthetic surrogates of 1-fluoroalkynes in [3+2] cycloaddition reactions with organic azides facilitated by a catalytic amount of trifloroacetic acid. This work provides the first regioselective method
Sampad, Jana +3 more
core +2 more sources
Acylation of 5-amino-1H-1,2,4-triazoles is selective for the nitrogen atom at the ring 1-position of the heterocycle to give 1-acyl-5-amino-1H-1,2,4-triazoles.
Nicholas A. Magnus (1950841) +3 more
core +1 more source
Synthesis and Fluorescent Behaviour of 2‑Aryl-4,5-dihydro‑1H‑1,2,4-triazoles
, 2016 A series of new 4,5-dihydro-1H-1,2,4-triazoles was synthesized from amidrazones and acetylenedicarboxylic acid esters in the presence of pyridine in toluene.
Olga O. Nesterenko (3564023) +4 more
core +1 more source