Results 51 to 60 of about 3,167 (267)

Chemoselective Protection and Deprotection of Aldehydes Using Solid Supported Reagent (Silica Chloride) under Solvent-Free Conditions [PDF]

, 2011
Silica chloride, a heterogeneous catalyst, has been found to be an efficient catalyst for the protection of aldehydes as acylals under solvent-free conditions, and deprotection of acylals to aldehydes in methanol as a solvent occurred. The reaction takes
Banditadatta, ., Pasha, M.A.
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An Efficient Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones and Thiones Catalyzed by a Novel Brønsted Acidic Ionic Liquid under Solvent-Free Conditions

Molecules, 2015
We report here an efficient and green method for Biginelli condensation reaction of aldehydes, β-ketoesters and urea or thiourea catalyzed by Brønsted acidic ionic liquid [Btto][p-TSA] under solvent-free conditions.
Yonghong Zhang, Bin Wang, Xiaomei Zhang, Jianbin Huang, Chenjiang Liu   +4 more
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An Efficient One-Pot Protocol for the Synthesis of Substituted 3,4-Dihydropyrimidin-2(1H)-ones Using Metallophthalocyanines (MPcs) as Potent Heterogeneous Catalysts: Synthesis, Characterization, Aggregation and Antimicrobial Activity

Molecules, 2017
In this study, novel phthalonitrile 3 and their corresponding metal-free 4 and metallophthalocyanine derivatives 5–7 bearing 2-isopropenyl-4-methoxy-1-methylbenzene groups were synthesized and characterized. 3,4-Dihydropyrimidinones have been synthesized
Naceur Hamdi, Rawdha Medyouni, Hallouma Bilel, Lamjed Mansour, Antonio Romerosa   +4 more
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One Pot Synthesis of Micromolar BACE-1 Inhibitors Based on the Dihydropyrimidinone Scaffold and Their Thia and Imino Analogues

Molecules, 2020
A library of dihydropyrimidinones was synthesized via a “one-pot” three component Biginelli reaction using different aldehydes in combination with β-dicarbonyl compounds and urea.
Jessica Bais, Fabio Benedetti, Federico Berti, Iole Cerminara, Sara Drioli, Maria Funicello, Giorgia Regini, Mattia Vidali, Fulvia Felluga   +8 more
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Mesoporous molecular sieve MCM-41 catalyzed one-pot synthesis of 3,4-dihydro-2(1H)-pyrimidinones and –thiones under solvent-free conditions [PDF]

, 2011
An efficient synthesis of 3,4-dihydro-2(1H)-pyrimidinones and -thiones using MCM-41 as the catalyst from an aldehyde, β-keto ester, and urea or thiourea under solvent-free conditions is described.KEY WORDS: Biginelli reaction, Dihydropyrimidinones, MCM ...
Baghernejad, Bita, Heidari, Maryam, Hekmatshoar, Rahim, M. Heravi, Majid.   +3 more
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Synthesis of some dihydropyrimidinone derivatives and study of their anti-inflammatory activity [PDF]

, 2018
This research revealed that the numbers of available heterocyclic compounds are mainly focused on nitrogen containing compounds, such as quinazolines, indoles, benzimidazole, quinoxalines, coumarins and pyrimidines etc. A mixture of substituted aldehydes
Choudhury, Tirthankar, Podilla, Naresh
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Applications of isothermal titration calorimetry - the research and technical developments from 2011 to 2015 [PDF]

, 2016
Isothermal titration calorimetry is a widely used biophysical technique for studying the formation or dissociation of molecular complexes. Over the last 5years, much work has been published on the interpretation of isothermal titration calorimetry (ITC ...
Ababou, Ababou, Adriaenssens, Aguirre, Alatorre-Meda, Amendola, Anglin, Aparicio, Arranz-Mascaros, Atkins, Bai, Baier, Batchelor, Bec, Becker, Biedermann, Biela, Biela, Biela, Bjelic, Bohin, Boncina, Borisova, Boudker, Brautigam, Breukels, Brinatti, Brotin, Bulatov, Burnouf, Bye, Bye, Cambon, Capkauskaite, Castellano, Cawthray, Cecioni, Cecioni, Chabot, Chabre, Chakraborti, Chakraborty, Chang, Chen, Chiappisi, Cliff, Cliff, Collins, Colussi, Comez, Cummaro, Dahms, Dale, De Lisi, Demarse, Dias, Dionisio, Dobreva, Du, Duff, Ebbinghaus, Edink, Eggers, Erales, Ertan, Falconer, Falconer, Fan, Ferenczy, Fox, Francis, Francisco, Frank, Freiburger, Freiburger, Freiburger, Freire, Gallegos, Garbett, Ghai, Ghosh, Gibb, Gruener, Gundlach, Guo, Hamre, Hansen, Hansen, Haris, Haslbeck, Head-Gordon, Henry, Henzl, Herold, Herrera, Hoernke, Holzerny, Hornung, Huang, Huang, Huang, Ikenoue, Jha, Jungbauer, Kabiri, Kamboj, Karonen, Keller, Khakshoor, King, Klebe, Kozin, Kozliak, Krainer, Krainer, Krauss, Krimmer, Krimmer, Kroflic, Kulikova, Kumar, Kuriyan, Lambert, Le, Le, Lewis, Li, Li, Lin, Lin, Lin, Lisbjerg, Loch, Lopez, Lu, Macias, Madrona, Markova, Martin, Martinez, Mashalidis, Matsunaga, Maximova, Mazzei, McCann, McRae, Mecinovic, Menchicchi, Mendez-Lorenzo, Mertins, Moers, Mokhtari, Muratcioglu, Neeb, Norwood, Okhrimenko, Olsen, Olsen, Olsson, Palde, Perspicace, Pethica, Platts, Priftis, Qin, Rajarathnam, Reille-Seroussi, Ren, Reynolds, Rich, Rocklin, Rogez-Florent, Rohatgi, Ruehmann, Sacco, Sack, Safaee, Safi, Scheuermann, Schumacher, Scott, Sgarlata, Sharma, Sheng, Sigurskjold, Smith, Subastri, Taladriz-Blanco, Tavares, Tellinghuisen, Tellinghuisen, Todd, Transtrum, Trapaidze, Trotta, Turcu, Uchman, Vander Meulen, Vega, Velazquez-Campoy, Velazquez-Campoy, Volkova, Wallace, Walrant, Wang, Wang, Wang, Wang, Wang, Weaver, Welsch, Werber, Willerich, Willerich, Winstone, Winzen, Wiseman, Wrench, Wszelaka-Rylik, Wyrzykowski, Wyrzykowski, Xu, Xu, Xu, Xu, Yokoyama, Yousefpour, Zakharov, Zeng, Zhang, Zhang, Zhao, Zhao, Zhao   +233 more
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Synthesis of 2-substituted benzimidazole, coumarin, benzo[b][1,4]oxazin and dihydropyrimidinone derivatives using core-shell structured Fe3O4@SiO2-ZnCl2 nanoparticles as an effective catalyst

Results in Chemistry, 2020
In this paper, a magnetic nanocatalyst of Fe3O4@SiO2-ZnCl2 has been used which enhances the synthesis of benzimidazoles, coumarins, benzoxazines and dihydropyrimidinones. To begin with, 2-substituted benzimidazoles have been synthesized in proper to high
Saba Rahimi, Ebrahim Soleimani
doaj   +1 more source

Ultrasound-assisted one-pot synthesis of dihydropyrimid-2-one/thiones catalyzed by zirconyl chloride hexahydrate [PDF]

مجلة التربية والعلم, 2013
Different substituted dihydropyrimidinones and  dihydropyrimidin thiones were generated from the Biginelli reaction between aromatic aldehydes, 1,3-dicarbonyl and urea or thiourea under ultrasonic irradiation method.
Omar Yahya, Badie Ahmed, Imad Thanoon
doaj   +1 more source

Eutectic Salt Catalyzed Environmentally Benign and Highly Efficient Biginelli Reaction [PDF]

, 2012
A simple deep eutectic solvent based on tin (II) chloride was used as a dual catalyst and environmentally benign reaction medium for an efficient synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives, from aromatic and aliphatic aldehydes, 1,3 ...
Azizi, Najmadin, Dezfuli, Sahar, Hahsemi, Mohmmad Mahmoodi   +2 more
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