Results 101 to 110 of about 3,427 (216)

SPECIFIC “IONIC LIQUIDS” AS NEW ORGANOCATALYSTS OF BIGINELLI REACTION [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2008
New ionic liquids bearing an imidazolium core with a carboxy group have been prepared in an attempt to design new organocatalysts of Biginelli reaction. Trends in the properties of these compounds are discussed.
Viorica Sargarovschi, Eugenia Styngach, Fliur Macaev   +2 more
doaj  

Synthesis and antimicrobial evaluation of new 1,4-dihydro-4-pyrazolylpyridines and 4-pyrazolylpyridines [PDF]

, 2011
Background Dialkyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylates (1,4-DHP) have now been recognized as vital drugs. Some of these derivatives such as amlodipine, felodipine, isradipine, etc. have been commercialized.
Om Prakash, Khalid Hussain, Ravi Kumar, Deepak Wadhwa, Chetan Sharma, Kamal R Aneja   +5 more
core   +1 more source

Green and Efficient Synthesis of Dihydropyrimidinone Analogues via Hpa-Clay Catalyzed Biginelli Reaction

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry
This study introduces an environmentally sustainable approach for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones (DHPMs), via the Biginelli reaction. A heterogeneous catalyst, Heteropolyacid-Clay (HPA-Clay), is developed by immobilizing H5PV2W10O40 on ...
Nuzhat Rehman, Ayaz Mahmood Dar, Raja Feroz Ahmad Haji, Sharief-ud-din Khan, Deepak Pareek, Saleem Farooq, Bashir Ahmad Dar   +6 more
doaj   +1 more source

Ferrocenil-származékok, heterovegyületek, poli-, illetve makrociklusos és glükozid-származékaik szintézise, szerkezete, sztereokémiai, molekuladinamikai és szisztematikus spektroszkópiai vizsgálata = Synthesis, structure, molecular dynamic, stereochemical and systematic spectroscopic study of ferrocenyl derivatives, heterocycles and their poly- and macrocyclic derivatives and glycosides. [PDF]

, 2011
Több száz új, várhatóan biológiailag aktív ferrocén (Fc) származékot és heterociklusos vegyületet állítottunk elő. Szerkezetüket komplex nagyműszeres vizsgálatokkal (IR, 1H-, 13C-, 15N NMR, DNOE NMR, MS, X-ray) derítettük fel, a reakciómechanizmust ...
Csámpai, Antal, Sohár, Pál, Zsoldosné dr. Mády, Virág   +2 more
core  

Using metrics and sustainability considerations to evaluate the use of bio-based and non-renewable Brønsted acidic ionic liquids to catalyse Fischer esterification reactions [PDF]

, 2013
Background Ionic liquids have found uses in many applications, one of which is the joint solvation and catalysis of chemical transformations. Suitable Brønsted acidic ionic liquids can be formed by combining lactams with sulphonic acids. This work weighs
AC Cole, AD Curzons, AR Hajipour, B Zhou, BF McKenzie, BM Trost, C Chiappe, C Cox, C Cox, C Jimenez-Gonzalez, C Jiménez-González, DJ Tao, G Fraenkel, GA Norton, GA Norton, GD Yadav, H Guo, H Zhang, H Zhou, J Augé, J Otera, JH Clark, JH Clark, JH Clark, JH Clark, JR Donovan, K Weissermel, L Zhang, LA Pfaltzgraff, M Phillips, M Pourbafrani, MA Martin-Luengo, MB Smith, O Linder, P Spica, PA Ganeshpure, R Luque, RA Sheldon, RL Frank, S Shanmugam, S Veillet, T Joseph, TM Lammens, TM Lammens, TM Lammens, TP Wells, VL Budarin, VN Gunaseelan, W Nehb, Z Panossian, ZS Qureshi, ÓJ Sánchez   +51 more
core   +1 more source

An unexpected Ireland–Claisen rearrangement cascade during the synthesis of the tricyclic core of Curcusone C: Mechanistic elucidation by trial-and-error and automatic artificial force-induced reaction (AFIR) computations [PDF]

, 2019
In the course of a total synthesis effort directed toward the natural product curcusone C, the Stoltz group discovered an unexpected thermal rearrangement of a divinylcyclopropane to the product of a formal Cope/1,3-sigmatropic shift sequence.
Houk, K. N., Lee, Chung Whan, Morokuma, Keiji, Patel, Ashay, Petrova, Galina P., Stoltz, Brian M., Taylor, Buck L. H.   +6 more
core   +5 more sources

Trifluoroacetic Acid as an Effective Catalyst for Biginelli Reaction: One-Pot, Three-Component Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones (and-Thiones)

E-Journal of Chemistry, 2011
Trifluoroacetic acid (TFA) is introduced as an effective catalyst for promotion of Biginelli reaction. 3,4-Dihydropyrimidin-2(1H)-one (-thione) derivatives (DHPMs) were simply and efficiently prepared using TFA catalyzed one-pot, three-component ...
Mohammad R. Mohammadizadeh, Neda Firoozi
doaj   +1 more source

Design e síntese de nanopartículas magnéticas funcionalizadas com peptóides para a remoção de cromo de resíduos aquosos [PDF]

, 2015
Dissertação (mestrado)–Universidade de Brasília, Faculdade UnB Planaltina, Mestrado em Ciência de Materiais, 2015.No presente trabalho realizou-se a síntese de nanopartículas magnéticas de óxido de ferro que foram funcionalizadas com peptóides.
Costa, Hingrid Lorrane Vieira da
core   +1 more source

Biginelli Reaction Mediated Synthesis of Antimicrobial Pyrimidine Derivatives and Their Therapeutic Properties. [PDF]

Molecules, 2021
Marinescu M.
europepmc   +1 more source

Development of chiral phosphoric acids based on ferrocene-bridged paracyclophane frameworks [PDF]

, 2013
International audienceThis work deals with the development of a new family of planar chiral phosphoric acids, based on a ferrocenophane/paracyclophane scaffold.
Betzer, Jean-François, Frison, Gilles, Isaac, Kevin, Marinetti, Angela, Pastor, Julien, Retailleau, Pascal, Stemper, Jérémy, Voituriez, Arnaud   +7 more
core   +6 more sources