Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Stefano Tollari"'
Autor:
Luca Scapinello, Federico Vavassori, Gabriella Ieronimo, Keshav L. Ameta, Giancarlo Cravotto, Marco Simonetti, Stefano Tollari, Giovanni Palmisano, Kenneth M. Nicholas, Andrea Penoni, Angelo Maspero
Publikováno v:
International Journal of Organic Chemistry. 12:127-142
Autor:
Luca, Scapinello, Angelo, Maspero, Stefano, Tollari, Giovanni, Palmisano, Kenneth M, Nicholas, Andrea, Penoni
We introduced a regioselective and atom-economical procedure for the synthesis of 3-substituted indoles by annulation of nitrosoarenes with ethynyl ketones. The reactions were carried out achieving indoles without any catalyst and with excellent regi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid_dedup__::18e17ff83661a2eaedbd07c28acd5f5f
http://hdl.handle.net/11383/2096205
http://hdl.handle.net/11383/2096205
Autor:
Mauro Botta, Angelo Maspero, Roberto Artali, Massimo Sisti, Giovanni Palmisano, Giovanni B. Giovenzana, Zsolt Baranyai, Roberto Negri, Stefano Tollari
Publikováno v:
New Journal of Chemistry. 39:539-547
Mn(II)-complexes are experiencing renewed interest as MRI contrast agents due to safety concerns related to the use of Gd(III)-chelates. While the preparation of oligomeric and polymeric Gd(III)-chelates is widely employed to multiply their efficienc
Autor:
Andrea Penoni, Francesca Colombo, Giancarlo Cravotto, Silvia Tagliapietra, Giovanni Palmisano, Francesco Tibiletti, Davide Garella, Stefano Tollari
Publikováno v:
Ultrasonics Sonochemistry. 18:652-660
3-(Aryl)methyl-4-hydroxycoumarins were produced in good to excellent yields by reaction between 4-hydroxycoumarin and (hetero)aromatic aldehydes in the presence of Hantzsch 1,4-dihydropyridine (HEH) which works as an hydride donor (i.e., in a sequent
Autor:
Andrea Penoni, Massimo Sisti, Kenneth M. Nicholas, Francesco Tibiletti, Stefano Tollari, Giovanni Palmisano
Publikováno v:
Current Organic Chemistry. 14:2409-2441
The present review is devoted to illustrate the state of the art of the syntheses of indoles, focusing particularly on the most recent developments of new synthetic approaches. Emphasis is given to the preparation of natural products or bioactive com
Publikováno v:
Synlett. 2005:0927-0930
3-Aryl-4-hydroxycoumarins have been obtained in satisfactory yields and selectivity through a Rh(II)-mediated arylation of diazocoumarin. The utility of this approach is demonstrated by synthesis of the natural product derrusnin.
Autor:
Andrea Penoni, Emma Gallo, Francesco Demartin, Fabio Ragaini, Riccardo Wanke, Danilo Musella, Stefano Tollari, Sergio Cenini
Publikováno v:
European Journal of Inorganic Chemistry. 2003:1452-1460
Cobalt(II) porphyrin complexes catalyze reactions between ethyl diazoacetate (EDA) and styrenes to give the corresponding cyclopropanes with trans selectivity. The reactions of other diazoalkanes and other olefins have also been carried out, and the
Autor:
Marta Lapadula, Emma Gallo, Andrea Penoni, Claudia Li Gotti, Stefano Tollari, Fabio Ragaini, Sergio Cenini, Enrica Mangioni
Publikováno v:
Chemistry - A European Journal. 9:249-259
Co I I -porphyrin complexes catalyze the reaction of aromatic azides (ArN 3 ) with hydrocarbons that contain a benzylic group (ArR 1 R 2 CH) to give the corresponding amines (ArR 1 R 2 C-N-HAr). When at least one of the R substituents is hydrogen, th
Autor:
Giovanni B. Giovenzana, Sergio Cenini, Giovanni Palmisano, Andrea Penoni, Stefano Tollari, Giancarlo Cravotto
Publikováno v:
Tetrahedron Letters. 43:3637-3640
In the presence of 3 mol% of [Ru(OAc) 2 ] 2 at 90°C in hexafluorobenzene or alcohols as solvents the highly stabilized diazocoumarin 1 undergoes insertion into the OH bond of alcohols (and phenols) regio- and chemoselectively, affording the correspo
Autor:
Giovanni B. Giovenzana, Giovanni Palmisano, Sergio Cenini, Stefano Tollari, Giancarlo Cravotto
Publikováno v:
Tetrahedron. 55:6577-6584
The overall sequence of Rh(II)-catalysed carbenoid generation, oxonium ylide formation and subsequent sigmatropic rearrangement utilising 3-diazo-2 H -1-benzopyran-2,4(3 H )-dione in cyclic ethers as solvents has been satisfactorily used to achieve t