Search Results - "BARTOLI, Giuseppe"

Recent advances in organocatalytic methods for the synthesis of disubstituted 2- and 3-indolinones by Dalpozzo, Renato, Bartoli, Giuseppe, Bencivenni, Giorgio

“…In recent years, organocatalysis has enhanced its importance as a tool for the synthesis of enantiomerically enriched compounds. Among the candidates for…”
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Applications of Bartoli indole synthesis by Bartoli, Giuseppe, Dalpozzo, Renato, Nardi, Monica

“…In 1989, the reaction of vinyl magnesium halides with ortho-substituted nitroarenes leading to indoles was discovered. This reaction is now frequently reported…”
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Asymmetric Aminocatalysis--Gold Rush in Organic Chemistry by Melchiorre, Paolo, Marigo, Mauro, Carlone, Armando, Bartoli, Giuseppe

“…Catalysis with chiral secondary amines (asymmetric aminocatalysis) has become a well-established and powerful synthetic tool for the chemo- and…”
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Organocatalytic strategies for the asymmetric functionalization of indoles by Bartoli, Giuseppe, Bencivenni, Giorgio, Dalpozzo, Renato

“…The desire for new synthetic methodologies for the rapid construction of enantiomerically pure substituted indole has been a fruitful driving force for…”
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Organocatalytic Michael-Alkylation Cascade: The Enantioselective Nitrocyclopropanation of Oxindoles by Pesciaioli, Fabio, Righi, Paolo, Mazzanti, Andrea, Bartoli, Giuseppe, Bencivenni, Giorgio

“…The spiro saga goes on! The title reaction sequence provides the first enantioselective synthesis of spiro nitrocyclopropyl oxindoles. The method provides easy…”
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Direct asymmetric vinylogous Michael addition of cyclic enones to nitroalkenes via dienamine catalysis by Bencivenni, Giorgio, Galzerano, Patrizia, Mazzanti, Andrea, Bartoli, Giuseppe, Melchiorre, Paolo, MacMillan, David W. C.

“…In spite of the many catalytic methodologies available for the asymmetric functionalization of carbonyl compounds at their α and β positions, little progress…”
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Applications of CeCl3 as an Environmental Friendly Promoter in Organic Chemistry by Bartoli, Giuseppe, Marcantoni, Enrico, Marcolini, Mauro, Sambri, Letizia

“…The role of cerium chloride in green organic chemistry is discussed. The potential reactions of compounds derived from cerium chloride and their effects on…”
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Perchloric Acid and Its Salts: Very Powerful Catalysts in Organic Chemistry by Dalpozzo, Renato, Bartoli, Giuseppe, Sambri, Letizia, Melchiorre, Paolo

“…The use of metal perchlorates as Lewis acids and its salts is examined. Magnesium and lithium perchlorates are dangers if heated with oxidizable materials or…”
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Targeting Structural and Stereochemical Complexity by Organocascade Catalysis: Construction of Spirocyclic Oxindoles Having Multiple Stereocenters by Bencivenni, Giorgio, Wu, Li-Yuan, Mazzanti, Andrea, Giannichi, Berardino, Pesciaioli, Fabio, Song, Mao-Ping, Bartoli, Giuseppe, Melchiorre, Paolo

“…Not so complex: The asymmetric one‐step construction of multiple stereocenters in complex spirocyclic oxindoles was achieved with very high fidelity by using…”
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Organocascade Reactions of Enones Catalyzed by a Chiral Primary Amine by Wu, Li-Yuan, Bencivenni, Giorgio, Mancinelli, Michele, Mazzanti, Andrea, Bartoli, Giuseppe, Melchiorre, Paolo

“…Primary amines do it differently: Acyclic α,β‐unsaturated ketones are activated toward a characteristic stepwise double‐Michael addition sequence by chiral…”
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Organocatalytic Asymmetric Aziridination of Enones by Pesciaioli, Fabio, De Vincentiis, Francesco, Galzerano, Patrizia, Bencivenni, Giorgio, Bartoli, Giuseppe, Mazzanti, Andrea, Melchiorre, Paolo

“…A primary amine derived from cinchona alkaloids as a salt with D‐N‐Boc phenylglycine (Boc=tert‐butoxycarbonyl) is an efficient catalyst for the aziridination…”
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Quaternary Stereogenic Carbon Atoms in Complex Molecules by an Asymmetric, Organocatalytic, Triple-Cascade Reaction by Penon, Oriol, Carlone, Armando, Mazzanti, Andrea, Locatelli, Manuela, Sambri, Letizia, Bartoli, Giuseppe, Melchiorre, Paolo

“…Triple (super) attack: The use of 2‐cyanoacrylate derivatives 2—the main component of one of the most used superglue solutions—in an asymmetric,…”
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Organocatalytic Asymmetric Conjugate Addition of 1,3-Dicarbonyl Compounds to Maleimides by Bartoli, Giuseppe, Bosco, Marcella, Carlone, Armando, Cavalli, Andrea, Locatelli, Manuela, Mazzanti, Andrea, Ricci, Paolo, Sambri, Letizia, Melchiorre, Paolo

“…Nature, our teacher! The natural alkaloids quinine (Q) and quinidine (QD) serve as efficient bifunctional organocatalysts in the asymmetric conjugate addition…”
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Microwave-Assisted Cerium(III)-Promoted Cyclization of Propargyl Amides to Polysubstituted Oxazole Derivatives by Bartoli, Giuseppe, Cimarelli, Cristina, Cipolletti, Roberto, Diomedi, Simone, Giovannini, Riccardo, Mari, Margherita, Marsili, Laura, Marcantoni, Enrico

“…Functionalized polysubstituted oxazoles are an important class of five‐membered N,O‐heterocycles that occur widely in the structure of natural products and…”
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Asymmetric Catalytic Aziridination of Cyclic Enones by De Vincentiis, Francesco, Bencivenni, Giorgio, Pesciaioli, Fabio, Mazzanti, Andrea, Bartoli, Giuseppe, Galzerano, Patrizia, Melchiorre, Paolo

“…The first catalytic method for the asymmetric aziridination of cyclic enones is described. The presented organocatalytic strategy is based on the use of an…”
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Efficient Transformation of Azides to Primary Amines Using the Mild and Easily Accessible CeCl3·7H2O/NaI System by Bartoli, Giuseppe, Di Antonio, Giustino, Giovannini, Riccardo, Giuli, Sandra, Lanari, Silvia, Paoletti, Melissa, Marcantoni, Enrico

“…Because of the nitrogen functionality, the azido group plays an important role in the synthesis of amines, and numerous reduction methods of azides to primary…”
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Highly efficient and versatile acetylation of alcohols catalyzed by cerium(III) triflate by Dalpozzo, Renato, De Nino, Antonio, Maiuolo, Loredana, Procopio, Antonio, Nardi, Monica, Bartoli, Giuseppe, Romeo, Roberto

“…Cerium(III) triflate is a powerful catalyst for the acetylation of alcohols. The reaction works well for a large variety of simple and functionalized alcohols,…”
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Alcohols and Di-tert-butyl Dicarbonate:  How the Nature of the Lewis Acid Catalyst May Address the Reaction to the Synthesis of tert-Butyl Ethers by Bartoli, Giuseppe, Bosco, Marcella, Carlone, Armando, Dalpozzo, Renato, Locatelli, Manuela, Melchiorre, Paolo, Sambri, Letizia

“…The reaction between alcohols and Boc2O leads to the formation of tert-butyl ethers and/or Boc-alcohols, depending on the nature of the Lewis acid catalyst…”
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Asymmetric Organocatalytic Reactions of α,β-Unsaturated Cyclic Ketones by Dalpozzo, Renato, Bartoli, Giuseppe, Bencivenni, Giorgio

“…The 1,4-conjugate addition of nucleophiles to α,β-unsaturated carbonyl compounds represents one fundamental bond-forming reaction in organic synthesis. The…”
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A convergent approach to (R)-Tiagabine by a regio- and stereocontrolled hydroiodination of alkynes by Bartoli, Giuseppe, Cipolletti, Roberto, Di Antonio, Giustino, Giovannini, Riccardo, Lanari, Silvia, Marcolini, Mauro, Marcantoni, Enrico

“…The occurrence of unsaturated systems in natural products combined with the mildness and the wide range of applicability of CeCl(3) promoted methodologies…”
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