Results 11 to 20 of about 67,862 (282)

Enantioselective Synthesis of [6]Carbohelicenes

Journal of the American Chemical Society, 2017
The use of α-cationic phosphonites derived from TADDOL as ancillary ligands has allowed a highly regio- and enantioselective synthesis of substituted [6]carbohelicenes by sequential Au-catalyzed intramolecular hydroarylation of diynes. Key for these results is the modular structure of these new ligands, and the enhanced reactivity that they impart to ...
Elisa González-Fernández, Leo D. M. Nicholls, Lukas D. Schaaf, Christophe Farès, Christian W. Lehmann, Manuel Alcarazo   +5 more
openaire   +6 more sources

Stereocontrolled enantioselective total synthesis of the [2+2] quadrigemine alkaloids [PDF]

, 2015
A unified strategy for enantioselective total synthesis of all stereoisomers of the [2+2] family of quadrigemine alkaloids is reported. In this approach, two enantioselective intramolecular Heck reactions are carried out at the same time on precursors ...
Canham, SM, Hafensteiner, BD, Lebsack, AD, May-Dracka, TL, Nam, S, Overman, LE, Stearns, BA   +6 more
core   +4 more sources

Enantioselective Synthesis of a New Non-Natural Gabosine

Molecules, 2021
The preparation of a new non-natural gabosine is reported, in which the chirality is transferred from the toluene’s biotransformed metabolite (1R,2S)-3-methylcyclohexa-3.5-diene-1,2-diol.
Maximiliano Colobbio, Enrique Pandolfi, Valeria Schapiro   +2 more
doaj   +1 more source

Challenging Atroposelective C–H Arylation

SynOpen, 2020
Atropisomeric molecules are privileged scaffolds, not only as ligands for asymmetric synthesis, but also as biologically active products and advanced materials.
Joanna Wencel-Delord, Françoise Colobert   +1 more
doaj   +1 more source

Phosphoramidite Gold(I)-Catalyzed Diastereo- and Enantioselective Synthesis of 3,4-Substituted Pyrrolidines [PDF]

, 2011
In this article the utility of phosphoramidite ligands in enantioselective AuI catalysis was explored in the development of highly diastereo- and enantioselective AuI-catalyzed cycloadditions of allenenes.
Benitez, Diego, Goddard, William A., III, González, Ana Z., Tkatchouk, Ekaterina, Toste, F. Dean   +4 more
core   +3 more sources

Synthesis of Solution-Phase Phosphoramidite and Phosphite Ligand Libraries and Their In Situ Screening in the Rhodium-Catalyzed Asymmetric Addition of Arylboronic Acids [PDF]

, 2007
Herein, we report the automated parallel synthesis of solution-phase libraries of phosphoramidite ligands for the development of enantioselective catalysts.
Feringa, Ben L.,, Jagt, Richard B.C.,, Minnaard, Adriaan J.,, Schudde, Ebe P.,, Toullec, Patrick Y.,, Vries, Johannes G. de,   +5 more
core   +1 more source

Enantioselective Total Synthesis of Macfarlandin C, a Spongian Diterpenoid Harboring a Concave-Substituted cis-Dioxabicyclo[3.3.0]octanone Fragment. [PDF]

, 2020
The enantioselective total synthesis of the rearranged spongian diterpenoid (-)-macfarlandin C is reported. This is the first synthesis of a rearranged spongian diterpenoid in which the bulky hydrocarbon fragment is joined via a quaternary carbon to the ...
Allred, Tyler K, Dieskau, André P, Lackner, Gregory L, Overman, Larry E, Zhao, Peng   +4 more
core   +2 more sources

Ferrocene-derived P,N ligands : synthesis and application in enantioselective catalysis [PDF]

, 2013
Due to their unique steric and electronic properties, air-stability and modular structure, chiral hybrid P,N-ferrocenyl ligands play a prominent role in the field of asymmetric catalysis.
Noël, Timothy, Van der Eycken, Johan
core   +1 more source

Catalytic asymmetric synthesis of the alkaloid (+)-myrtine [PDF]

, 2008
A new protocol for the asymmetric synthesis of trans-2,6-disubstituted-4-piperidones has been developed using a catalytic enantioselective conjugate addition reaction in combination with a diastereoselective lithiation–substitution sequence; an efficient
Adriaan J. Minnaard, Albrow, Alexakis, Alexakis, Anderson, Bach, Back, Beak, Beak, Beak, Beak, Beak, Beak, Beak, Ben L. Feringa, Bennett, Bennett, Berkheij, Bertini Gross, Brooks, Comins, Comins, Comins, Comins, Comins, Comins, Comins, Curtin, d'Augustin, Davis, Dieter, Dieter, Dieter, Dieter, Dieter, Eilitz, Frankel, Fraser, Gallagher, Garcia-Ruiz, Gardette, Gelas-Mialhe, Hoffmann, Houk, Kerrick, King, Leclercq, Liang, Maria Gabriella Pizzuti, Pilli, Pilli, Pineschi, Pàmies, Remuson, Slosse, Slosse, Still, Tawara, Vuagnoux-d'Augustin, Vuagnoux-d'Augustin, Watson, Whisler, Šebesta   +62 more
core   +1 more source

Alilação e crotilação catalítica e enantiosseletiva de aldeídos

Química Nova, 2006
The field of chiral catalysis has experienced explosive growth over the last two decades. By now, many of the classical reactions in organic synthesis can be carried out efficiently in asymmetric manner.
Ângelo de Fátima, Luís Gustavo Robello, Ronaldo Aloise Pilli   +2 more
doaj   +3 more sources