Results 91 to 100 of about 53,373 (308)
ChemSusChem, Volume 18, Issue 6, March 15, 2025.Sustainable hydrogen production can be obtained from hydogen‐rich biomass‐derived organic molecules through Acceptorless Dehydrogenation (AD) reactions. Glycerol and sugars are available in large quantities from industry and can be successfully used as substrates in AD protocols, in the presence of tailored, selective, easily tunable and thermally ...
Sylwia Kostera, Luca Gonsalvi
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
, 2010 New (Z)- and (E)-1-alkyl-3-(2-hydroxyphenyl)-4-styryl-1H-pyrazoles and (Z)- and (E)-3(5)-(2-alkyloxyphenyl)-4-styryl-1H-pyrazoles were prepared by alkylation of (Z)- and (E)-3(5)-(2-hydroxyphenyl)-4-styryl-1H-pyrazoles with a long chain alkyl bromide in ...
Silva, V. L. M. +19 more
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Ullmann‐Type N‐Heteroarylation of Nitrogen Heterocycles Catalyzed by Heterogeneous CuNPs/HKUST‐1
EcoEnergy, EarlyView.A practical strategy for the direct synthesis of CuNPs/HKUST‐1 heterogeneous catalyst was developed and used for the catalyzing Ullmann‐type N‐arylation of N‐heterocycles with high yields, excellent recyclability, and low copper leaching. ABSTRACT Ullmann‐type C–N coupling is an essential reaction to construct functional nitrogen heterocycles, whereas ...
Shuai Yang +9 more
wiley +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
AMINO-PYRAZOLES: A PRIVILEGED SCAFFOLD FOR THE SYNTHESIS OF BIOLOGICALLY ACTIVE COMPOUNDS
, 2023 Taking as lead structures previous reported pyrazoles, we designed and synthesized novel series of pyrazoles 2-5. All the isolated molecules were prepared by a stepwise protocol that allowed the preparation of N,S-thioketal intermediates which were then ...
Matteo Lusardi
core
European Journal of Inorganic Chemistry, EarlyView.Rollover cyclometalation is a distinctive variant of classical cyclometalation where a chelated heterocyclic ligand undergoes internal rotation, releasing one donor atom from coordination and subsequently activating a remote C─H bond with high regioselectivity.
Antonio Zucca, Maria I. Pilo
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Rh(III) catalyzed oxidative synthesis of pyrazoles from azomethines and acrylamides
, 2013 Rh(III) catalyzed oxidative synthesis of pyrazoles from azomethines and ...
李兴伟, 甄文翠, 杜正银
core
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
Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles
European Journal of Organic Chemistry, EarlyView.Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu +2 more
wiley +1 more source