Buscar
Mostrando ítems 21-30 de 1502
Metal carbene N-H insertion of chiral alpha,alpha '-dialkyl alpha-diazoketones. A novel and concise method for the stereocontrolled synthesis of fully substituted azetidines
(Pergamon-elsevier Science LtdOxfordInglaterra, 2004)
One-pot-like facile synthesis of YBa2Cu3O7-δ superconducting ceramic: Using PVP to obtain a precursor solution in two steps
(2020-03-01)
There are a variety of chemical routes used to produce advanced ceramic materials. The sol-gel-like methods are widely applied since the final samples present high stoichiometric and grain size homogeneity. However, with ...
Synthesis of a Small Library of Imidazolidin-2-ones using Gold Catalysis on Solid Phase
(American Chemical Society, 2016-08)
An efficient and high-yielding solid phase synthesis of a small library of imidazolidin-2-ones and imidazol-2-ones was carried out employing a high chemo- and regioselective gold-catalyzed cycloisomerization as a key step. ...
One-Step Synthesis of Methoxylated Phloroglucinol Derivatives Promoted by Niobium Pentachloride: An Experimental and Theoretical Approach
(2017-06-01)
Phloroglucinol derivatives are an important class of natural compounds featuring the rhodomyrtone derivatives. In this work, the synthesis of compounds with a structure core of rhodomyrtosone I is described using a ...
One-step biomimetic conversion of a furanoheliangolide into an eremantholide using Stryker`s reagent
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)
The conversion of a furanoheliangolide structure (15-deoxygoyazensolide) into an eremantholide one (eremantholide C) was achieved by tandem hydride conjugate addition-intramolecular carbanion addition using Stryker`s ...
One-step room temperature synthesis of very small g-Fe2O3 nanoparticles
(Elsevier, 2013-05)
Very small maghemite nanoparticles (~3 nm) are obtained through a one-step synthesis at room temperature. The fast neutralization reaction of a ferric solution in a basic medium produces an intermediate phase, presumably ...
Sequential Morita-baylis-hillman/achmatowicz Reactions: An Expeditious Access To Pyran-3(6h)-ones With A Unique Substitution Pattern
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2015)
One-Pot, Three-Step Reaction of 5-[(Trimethylsilyl)ethynyl]pyrrolidin-2-one with Azides Catalyzed by Cu-I: Synthesis of a Novel Class of 1,4-Disubstituted 1,2,3-Triazoles
(Csiro Publishing, 2012-01-01)
A very fast, easy and efficient synthesis is described for a novel and biologically important class of 1,4-disubstituted-4-(5-pyrrolidin-2-one)-1,2,3-triazoles by an ultrasound-assisted one-pot, three-step click reaction ...