Results 231 to 240 of about 14,677 (287)

Stereoselective Total Synthesis of Nimbolide. [PDF]

J Am Chem Soc
Ryffel DB, Ryffel PC, Martinelli M, Pillai VR, Sarlah D.   +4 more
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Nazarov cyclization of fully substituted dienones : catalytic diastereospecific and enantioselective construction of vicinal all-carbon atom quaternary stereocenters

, 2014
Anaïs Jolit
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Palladium‐Catalyzed Asymmetric Quaternary Stereocenter Formation

Chemistry – A European Journal, 2012
AbstractAn efficient palladium catalyst is presented for the formation of benzylic quaternary stereocenters by conjugate addition of arylboronic acids to a variety of β,β‐disubstituted carbocyclic, heterocyclic, and acyclic enones. The catalyst is readily prepared from PdCl2, PhBOX, and AgSbF6, and provides products in up to 99 % enantiomeric excess ...
Gottumukkala, A.L., Matcha, K., Lutz, M., de Vries, J.G., Minnaard, A.J.   +4 more
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Synthesis of methanesulfone-containing tetrasubstituted carbon stereocenters

Organic & Biomolecular Chemistry, 2021
Synthesis of sulfone-containing tetrasubstituted carbon stereocenters.
Wei Zhou, You-Ping Tian, Hao-Jie Zhou, Hui-Juan Wang, Yan Ren, Xiong-Li Liu   +5 more
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Nucleophilic Substitution at Quaternary Carbon Stereocenters

Journal of the American Chemical Society, 2020
Cyclopropyl carbinol derivatives undergo a regio- and stereoselective nucleophilic substitution at the quaternary carbon center, with pure inversion of configuration, to provide the acyclic products as a single diastereomer. The selectivity of the substitution is attributed to the existence of a cyclobutonium species, reacting at the most substituted ...
Veeranjaneyulu Lanke, Ilan Marek
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Organocatalytic Formation of Quaternary Stereocenters

Synthesis, 2009
This work reviews the authors' choice of recently published papers where at least one asymmetric quaternary stereocenter has been formed via organocatalysis. The scope and limitations of the reactions are highlighted.
BELLA, Marco, Tecla Gasperi
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Enantioselective Construction of Quaternary Stereocenters

Angewandte Chemie International Edition, 2001
The stereoselective formation of C-C bonds is of great importance for the synthesis of enantiomerically pure natural products and pharmaceuticals. A broad repertoire of chiral auxiliaries, reagents, and catalysts can be utilized for the reliable generation of tertiary stereocenters.
Jens, Christoffers, Alexander, Mann
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Quaternary Stereocenters via Catalytic Enantioconvergent Allylation of Epoxides

Journal of the American Chemical Society, 2023
The development of catalytic and enantioselective transformations for the synthesis of all-carbon quaternary stereocenters has long been recognized as a significant challenge in organic synthesis. While considerable progress has been made in asymmetric allylations, their potential to functionalize the commonly used synthon, epoxide, remains largely ...
Jian Shen, Zhongyun Xu, Shuo Yang, Shengxiao Li, Jie Jiang, Yong-Qiang Zhang   +5 more
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Stereoselective Construction of Quaternary Stereocenters

Advanced Synthesis & Catalysis, 2005
AbstractQuaternary stereocenters are a particular challenge for stereoselective synthesis. With a central view on this specific structural issue, selected examples from the recent literature are highlighted in order to evaluate the state of the art of asymmetric CC bond formation.
Jens Christoffers, Angelika Baro
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Fundamental curiosity of multivicinal inter-halide stereocenters

Organic Chemistry Frontiers, 2022
A stereoselective strategy allowed the striking impact of a single halogen on the physical properties of inter-halide alkane units to be unravelled.
Olivier Lessard, Danny Lainé, Charles-Émile Fecteau, Paul A. Johnson, Denis Giguère   +4 more
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