Results 51 to 60 of about 18,189 (198)
Direct α-Imination of N-Acyl Pyrazoles with Nitrosoarenes [PDF]
, 2019 Unprecedented α-imino N-acyl pyrazoles were efficiently and selectively prepared through the 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed reaction of nitrosoarenes with N-acyl pyrazoles via an N-nitroso aldol reaction/dehydration sequence.
Overgaard J. +5 more
core +1 more source
Beilstein Journal of Organic ChemistryA series of 4-thio/seleno-cyanated pyrazoles was conveniently synthesized from 4-unsubstituted pyrazoles using NH4SCN/KSeCN as thio/selenocyanogen sources and PhICl2 as the hypervalent iodine oxidant.
Jialiang Wu +6 more
doaj +1 more source
Synthesis of Novel Pyrazole Derivatives and Their Tumor Cell Growth Inhibitory Activity
Molecules, 2019 To find novel antitumor agents, a series of 1H-benzofuro[3,2-c]pyrazole derivatives 4a-e were designed and synthesized. The treatment of 6-methoxybenzofuran-3(2H)-one 3 with LiHMDS in anhydrous tetrahydrofuran (THF) followed by reaction with 3-substitued
Ying-Jie Cui +3 more
doaj +1 more source
Molecules, 2020 The need for increasingly personalized medicine solutions (precision medicine) and quality medical treatments, has led to a growing demand and research for image-guided therapeutic solutions.
Pedro M. O. Gomes +2 more
doaj +1 more source
Regioselective Preparation of Saturated Spirocyclic and Ring-Expanded Fused Pyrazoles [PDF]
, 2016 Saturated bicyclic pyrazoles represent an important class of biologically active molecules, but their preparation can be hampered by labor-intensive synthesis of required starting materials.
David C. Blakemore (1748281) +3 more
core +1 more source
Rhenium(Iv) Complexes with Pyrazole and Substituted-pyrazoles
, 1989 Department of Chemistry,Jadavpur University. Calcutta-700 082 Manuscript received 10 February 1988, revised 26 September 1988, accepted 14 December 1988 IN this paper we report rhenium(Iv) complexes of the type Re2 O2 Cl4,L4, where L=pyrazole (Pz), 3-methylpyrazole (MePz), 3,5-dimethylpyrazole (DmPz), 3,4,5-trimethylpyrazole (TmPz) and 1,3,4,5 ...
SHYMAL ROY CHOWDHURY +2 more
openaire +2 more sources
Filling the Gap: Chemistry of 3,5-Bis(trifluoromethyl)-1H-pyrazoles [PDF]
, 2012 Pyrazoles represent important building blocks for the preparation of bioactive compounds and a large variety of materials, due to their rich coordination chemistry.
Monticelli D +5 more
core +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
Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones [PDF]
, 2014 National Natural Science Foundation of China [21272190]; PCSIRT in University; NFFTBS [J1210014]Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones with sulfonyl group migrations has ...
Xiao, Yu-Wei +7 more
core
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