Results 101 to 110 of about 4,172 (223)

Ultrasound assisted 1,4-diazabicyclo[2.2.2]octaniumdiacetate multicomponent synthesis of benzodiazepines: A novel, highly efficient and green protocol

open access: yesActa Chimica Slovenica, 2018
A simple and efficient method is presented for the synthesis of benzodiazepines through the multicomponent reaction of o-phenylenediamine, various aldehydes and 5,5-dimethylcyclohexane-1,3-dione (dimedone) in the presence of the acidic bis ionic liquid 1,
Leila Zare Fekri   +2 more
doaj   +1 more source

Approaches to the chemical synthesis of food [PDF]

open access: yes
Conversion of human wastes, carbon dioxide water, and urea into food for space ...
Shapira, J.
core   +1 more source

Diazo Transfer Reactions to 1,3-Dicarbonyl Compounds with Tosyl azide [PDF]

open access: yes, 2011
International audienceA practical protocol for the large-scale preparation of 2-diazo-1,3-dicarbonyl compounds is described by diazo-transfer reactions with tosyl azide followed by efficient chromatographic purifications on silica gel and/or ...
Coquerel, Yoann   +3 more
core   +2 more sources

Bismuth nitrate as an efficient recyclable catalyst for the one-pot multi component synthesis of 1,4-dihydropyridine derivatives through unsymmetrical Hantzsch reaction

open access: yesJournal of Saudi Chemical Society, 2016
Bismuth nitrate catalyzed efficient Hantzsch reaction via four-component coupling reactions of aromatic aldehydes, 5,5-dimethyl-1,3-cyclohexanedione (dimedone), ethyl acetoacetate and ammonium acetate at 80 °C temperature was described as the preparation
S. Sheik Mansoor   +3 more
doaj   +1 more source

One Pot Synthesis of Polyhydroquinolines Catalyzed by Sulfonic Acid Functionalized SBA-15 as a New Nanoporous Acid Catalyst under Solvent Free Conditions [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2010
Sulfonic acid functionalized SBA-15 (SBA-Pr-SO3H) as a new nanoporous acid catalyst was used in the one-pot synthesis of polyhydroquinolines derivatives via the Hantzsch four component condensation reaction of aldehydes, b-ketoesters, dimedone and ...
Ghodsi Mohammadi Ziarani   +3 more
doaj  

Application of Sulfonic Acid Functionalized Nanoporous Silica (SBA-Pr-SO3H) in the Green One-pot Synthesis of Polyhydroacridine Libraries [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2013
1,8-Dioxo-decahydroacridines have been synthesized by the three-component reaction of aromatic aldehydes, aromatic amines (or ammonium acetate), and dimedone in the presence of sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) under solvent ...
Ghodsi Mohammadi Ziarani   +4 more
doaj  

Однореакторний синтез 3,4-діарилзаміщених імідазолін-2-онів за участю димедону, арилгліоксалей та сечовин [PDF]

open access: yes, 2008
Однореакторним синтезом за участю димедону, арилгліоксалей, сечовин або N-арилсечовин синтезовано 4-арил- та 3,4-діарил-5-(2-димедоїл)імідазолін-2-они, відповідно.
Замігайло, Л.Л.   +1 more
core  

New processes for the synthesis of biologically relevant heterocycles

open access: yes, 2016
This article describes the utility of certain readily accessible, ring-fused gem-dihalogenocyclopropanes as building blocks for the synthesis of heterocyclic and biologically active compounds.The Australian Research Council and the Institute of ...
Banwell, Martin
core   +1 more source

The Crystal and Molecular Structure of Dimedone. [PDF]

open access: yesActa Chemica Scandinavica, 1974
Dag Semmingsen   +5 more
openaire   +1 more source

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