Results 81 to 90 of about 42,319 (209)

Controlling the Product Selectivity of Peracetic Acid‐Mediated Oxidative Lignin Depolymerization via a Deep Eutectic Solvent

ChemSusChem, EarlyView.
Controlled Peracetic acid mediated oxidative depolymerization of lignins via deep eutectic solvents extraction using choline chloride/lactic acid and lactic acid/pyrazole solvents, correlating lignin structure with product selectivity for sustainable biorefineries.
Udishnu Sanyal, Junxia Wang, Peipei Wang, Ruoshui Ma, Santheeb Balaji Velmurugan, Kuan‐Ting Lin, Xiao Zhang   +6 more
wiley   +1 more source

Pyrazolyl‐Pyridine Ruthenium (II) Catalysts for Selective Hydrogen Generation Through Formic Acid Dehydrogenation

European Journal of Inorganic Chemistry, EarlyView.
Hydrogen production from liquid organic hydrogen carriers continues to garner significant attention. Herein, pyrazolyl‐pyridine ligated Ru(II) complexes are presented, which are efficient hydrogen production catalysts from formic acid. A suite of analytical and experimental techniques reveals key insights into catalyst activation and deactivation, as ...
Rotondwa Mphephu, M. Cassiem Joseph, Andrew John Swarts   +2 more
wiley   +1 more source

Structure of 2-Methyl-5,6,7-triphenyl-6,7-dihydropyrazolo[2,3-\u3cem\u3ea\u3c/em\u3e]pyrimidine [PDF]

, 1993
C25H21N3, Mr = 363.46, monoclinic, P21/n, a = 9.245 (2), b = 23.502 (5), c = 9.340 (2) Å, β= 103.50(3)°, V=1973.3(2) Å3, Z=4, Dx= 1.220 (2) g cm-3, λ (Mo Kα )= 0.71069 Å, μ = 0.068 cm-1, F(000) = 768, T= 292 K, R = 0.091 for 1442 unique observed ...
Desenko, S. M., Lindeman, Sergey V., Lipson, V. V., Orlov, V. D., Shishkin, O. V., Struchkov, Yuri T.   +5 more
core   +1 more source

Terpenes and Terpenoids: How can we use them?

European Journal of Organic Chemistry, EarlyView.
The transition from petroleum‐based to renewable bio‐based chemicals has led to increased interest in terpenes and terpenoids. This overview highlights their chemistry, focusing on their reactivity and applications in polymerizations, total syntheses, pharmaceuticals, and bio‐based chemical conversions; promoting sustainable and green chemical ...
Jay Hanssens, Diego Meneses, Jordy M. Saya, Romano V. A. Orru   +3 more
wiley   +1 more source

Metal‐Organic Frameworks‐Based Copper Catalysts for CO2 Electroreduction Toward Multicarbon Products

Exploration, EarlyView.
This review discusses design principles, preparation approaches, and performance achievements of metal‐organic frameworks (MOF)‐based Cu catalysts for electrochemical CO2 reduction to C2+ products. The correlation between synthesis, composition/structure, and catalytic properties was critically discussed to reveal catalytic mechanisms and performance ...
Chen Qin, Xuheng Li, Ting Wang, Zhen Xu, Kai‐Jie Chen, Fuping Pan   +5 more
wiley   +1 more source

A Systematic Review of Synthetic and Anticancer and Antimicrobial Activity of Quinazoline/Quinazolin‐4‐one Analogues

ChemistryOpen, EarlyView.
Quinazoline represents an important class of heterocycles with diverse medicinal and pharmacological significance. This review systematically examines scholarly efforts toward understanding different synthetic pathways emphasizing the role of metal and non‐metal catalysts including some miscellaneous reagents employed in the synthesis of quinazoline ...
Neha Manhas, Gobind Kumar, Sanjeev Dhawan, Talent Makhanya, Parvesh Singh   +4 more
wiley   +1 more source

Efficient Regioselective Iodination of Pyrazole Derivatives Mediated by Cadmium(II) Acetate

ChemistryOpen, EarlyView.
The iodination reactions of both N, C alkyl‐, propargylic substituted and unsubstituted pyrazole derivatives initiated by cadmium (II) acetate were performed. It was revealed that the C‐4 position of the pyrazole ring was more nucleophilic. The nucleophilicity of the pyrazole ring significantly increased due to the influence of alkyl groups and ...
Nina G. Hobosyan, Kristine V. Balyan, Lusine A. Movsisyan, Varduhi S. Hovsepyan, Armen G. Ayvazyan, Henrik A. Panosyan, Hovhannes S. Attaryan, Hmayak B. Sargsyan, Haykanush R. Pogosyan   +8 more
wiley   +1 more source

Unexpected Tellurohalogenation of Terminal N‐Alkynyl (Alkenyl) Derivatives of 4‐Functionalized Pyrazoles

ChemistryOpen, EarlyView.
New tellurium‐containing tetrahydropyrazolo[1,2‐a]pyridazines and dihydropyrazolo[1,2‐a]pyrazoles were obtained by electrophilic heterocyclization in the form of intramolecular salts, and optimal conditions for their synthesis were found. The heterocyclization process is regio‐ and stereoselective, which is confirmed by spectral studies, and by X‐ray ...
Marianna V. Povidaichyk, Svitlana V. Shishkina, Eugeniy M. Ostapchuk, Mykhaylo Yu. Onysko   +3 more
wiley   +1 more source

SiO2@Benzothiazole‐Cl@Fc as an Efficient Heterogeneous Catalyst for the Synthesis of 1,3,5‐Trisubstituted Pyrazoles by A3 Coupling

ChemistryOpen, EarlyView.
This research introduces the preparation and analysis of a newly heterogeneous catalyst developed silica nanospheres supporting a ferrocene‐containing ionic liquid (SiO2@Benzothiazole‐Cl@Fc) for the A3 coupling reaction. The catalyst facilitates the efficient synthesis of 1,3,5‐trisubstituted pyrazoles from aromatic hydrazides, aldehydes, and aromatic ...
Fadhil Faez Sead, Vicky Jain, Roopashree R, Aditya Kashyap, Suman Saini, Girish Chandra Sharma, Pushpa Negi Bhakuni, Mosstafa Kazemi, Ramin Javahershenas   +8 more
wiley   +1 more source

Chemistry and Pharmacological Activities of Pyrazole and Pyrazole Derivatives: A Review [PDF]

International Journal of Pharmaceutical Sciences Review and Research, 2020
Neetu Sachan, Gurdeep, Phool Chandra
openaire   +1 more source