Results 61 to 70 of about 19,339 (247)
Mechanochemical Amidation Mediated by 1,1’‐Oxalyldiimidazole for the Synthesis of Agrochemicals
Chemistry – A European Journal, EarlyView.Mechanochemical amidation using 1,1'‐oxalyldiimidazole (ODI) overcomes limitations of 1,1’‐carbonyl diimidazole (CDI) as coupling agent by enabling the efficient mechanochemical synthesis of three marketed agrochemicals from deactivated carboxylic acids.
Andrea Casagrande +6 more
wiley +1 more source
Precision Chemistry for Protein Lysine Modification
Chemistry – A European Journal, EarlyView.Selective modification of lysine residues is challenging due to their similar intrinsic reactivity. Inspired by enzymatic recognition, ligand‐guided electrophiles enable site‐selective labeling and functionalization, while ligand‐guided catalyses achieve regioselective installation of bio‐relevant post‐translational modifications.
Mayu Onoda, Motomu Kanai
wiley +1 more source
5-(2,3-Dichlorophenyl)-3-(4-methoxyphenyl)-1-phenyl-4,5-dihydro-1H-pyrazole
IUCrData, 2017 In the racemic title compound, C22H18Cl2N2O, the dihedral angles between the central dihydropyrazole ring (r.m.s. deviation = 0.018 Å) and the pendant methoxyphenyl, phenyl and dichlorophenyl rings are 3.96 (9), 15.90 (9) and 66.65 (9)° respectively ...
D. M. Lokeshwari +6 more
doaj +1 more source
, 2011 Regioselective Synthesis of Multisubstituted Pyrazoles via Cyclocondensation of β-Thioalkyl-α,β-Unsaturated Ketones with ...
于海丰, 金伟伟, 余正坤
core
Fluorogenic Sydnones for Bioorthogonal Labeling of DNA
Chemistry – A European Journal, EarlyView.Conjugates of sydnones with cyanine‐styryl dyes combine bioorthogonal reactivity with fluorogenicity. The reactivity with bicyclo[6.1.0]non‐4‐yne (BCN)‐modified DNA showed second‐order rate constants of up to k2 = 2,300 M−1s−1 and fluorescence turn‐on by one magnitude of order.
Kerstin Müller +1 more
wiley +1 more source
SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF NOVEL FUSED PYRAZOLES [PDF]
, 2015 Objective: The aim of the present work was to synthesize fused pyrazoles and examine them for their in vitro antimicrobial activity.Methods: The formyl pyrazoles were synthesized by Vilsmeier–Haack reaction from o-hydroxy acetophenone hydrazones.
Nagamallu, Renuka +2 more
core +1 more source
Molecules, 2000 Pyrrolidino[3,4-c]pyrazoline and pyrazole derivatives were synthesized via reactions of a substituted hydrazonoyl bromide with N-arylmaleimides and active methylene reagents, respectively. Synthesized pyrazoles were reacted with hydrazine hydrate to give
Nagla A. Ahmed +3 more
doaj +1 more source
Chemistry – A European Journal, EarlyView.Cyclopropylamines have emerged as powerful photocatalytic building blocks. Upon light‐induced single‐electron oxidation, they undergo strain‐release ring opening to generate distonic iminium radicals that enable diverse transformations, including ring‐opening functionalization, formal [3 + 2] cycloadditions, radical cascades, and asymmetric bond ...
Maria Chiara Cabua +3 more
wiley +1 more source
Synthesis and Antimicrobial Evaluation of Some Heterocyclic Chalcone Derivatives
Molecules, 2011 Some new heterocyclic compounds containing isoxazole, pyrazole and oxadiazole ring systems were prepared from various chalcones. The synthesized compounds have been characterized by elemental analysis and spectral methods.
Essam Mohamed Sharshira +1 more
doaj +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2020 Two new chalcones containing both pyrazole and thiophene substituents have been prepared and structurally characterized. 3-(3-Methyl-5-phenoxy-1-phenyl-1H-pyrazol-4-yl)-1-(thiophen-2-yl)prop-2-en-1-one, C23H18N2O2S (I), and 3-[3-methyl-5-(2-methylphenoxy)
Mohammed A. E. Shaibah +5 more
doaj +1 more source