Bimetallic Catalysis in Stereodivergent Synthesis

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(45)

Опубликована: Авг. 2, 2022

Abstract Bimetallic catalysis has emerged as an efficient strategy for the development of new chemical reactions. Importantly, this also provides a simple and powerful platform stereodivergent synthesis, whereby all possible stereoisomers products bearing two stereocenters can be easily prepared from same set starting materials. In Minireview, allylic substitution, propargylic hydrofunctionalization, annulation based on bimetallic been summarized. It is expected that more catalytic systems will developed applied synthesis valuable molecules.

Язык: Английский

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Stereodivergent total synthesis of rocaglaol initiated by synergistic dual-metal-catalyzed asymmetric allylation of benzofuran-3(2H)-one

Chem, Год журнала: 2022, Номер 8(7), С. 2011 - 2022

Опубликована: Май 2, 2022

Язык: Английский

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Synergizing palladium with Lewis base catalysis for stereodivergent coupling of 1,3-dienes with pentafluorophenyl acetates

Chem, Год журнала: 2022, Номер 8(10), С. 2784 - 2796

Опубликована: Авг. 17, 2022

Язык: Английский

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Stereodivergent Construction of 1,4‐Nonadjacent Stereocenters via Hydroalkylation of Racemic Allylic Alcohols Enabled by Copper/Ruthenium Relay Catalysis

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(36)

Опубликована: Июнь 28, 2022

An unprecedented hydroalkylation of racemic allylic alcohols and ketimine esters enabled by Cu/Ru relay catalysis has been developed via merging the ruthenium-catalyzed asymmetric borrowing-hydrogen reaction with a copper-catalyzed Michael addition in one-pot procedure. The current method enables efficient preparation highly functionalized δ-hydroxyesters bearing 1,4-nonadjacent stereocenters good yields high levels diastereoselectivity excellent enantioselectivity under mild conditions. full complement four stereoisomers products could be readily accessed orthogonal permutations two chiral metal catalysts. work highlights power for stereodivergent construction that were otherwise inaccessible.

Язык: Английский

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Diastereodivergent Desymmetric Annulation to Access Spirooxindoles: Chemical Probes for Mitosis

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(7), С. 4199 - 4207

Опубликована: Фев. 13, 2023

Spirooxindoles have emerged as promising architectures for engineering biologically active compounds. The diastereodivergent construction of unique scaffolds this type with full control continuous chiral centers including an all-carbon quaternary stereogenic center is yet to be developed. Here, we report unprecedented desymmetric [3 + 3] annulation oxabicyclic alkenes enals enabled by N-heterocyclic carbene (NHC)/Rh cooperative catalysis, leading a series enantiomerically enriched spirooxindole lactones excellent enantioselectivities (up >99% ee) and diastereoselectivities >95:5 dr). combined catalyst system comprises rhodium complex that controls the configuration at electrophilic carbon NHC nucleophilic oxindole-containing carbon; thus, four stereoisomers products can readily obtained simply switching configurations two catalysts. Transformations spirooxindoles delivered synthetically useful Importantly, those arrested mammalian cells in mitosis exhibited potent antiproliferative activities against HeLa cells. Significantly, both absolute relative exert prominent effects on bioactivities, underscoring great importance catalytic asymmetric synthesis beyond creating tools exploration structure–activity relationships.

Язык: Английский

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Palladium-Catalyzed Ligand-Controlled Switchable Hetero-(5 + 3)/Enantioselective [2σ+2σ] Cycloadditions of Bicyclobutanes with Vinyl Oxiranes

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(29), С. 19621 - 19628

Опубликована: Май 13, 2024

For nearly 60 years, significant research efforts have been focused on developing strategies for the cycloaddition of bicyclobutanes (BCBs). However, higher-order and catalytic asymmetric BCBs long-standing formidable challenges. Here, we report Pd-catalyzed ligand-controlled, tunable cycloadditions divergent synthesis bridged bicyclic frameworks. The dppb ligand facilitates formal (5+3) vinyl oxiranes, yielding valuable eight-membered ethers with scaffolds in 100% regioselectivity. Cy-DPEphos promotes selective hetero-[2σ+2σ] to access pharmacologically important 2-oxabicyclo[3.1.1]heptane (O-BCHeps). Furthermore, corresponding O-BCHeps 94–99% ee has achieved using chiral (S)-DTBM-Segphos, representing first cross-dimerization two strained rings. obtained are promising bioisosteres ortho-substituted benzenes.

Язык: Английский

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Stereodivergent Synthesis of Allenes with α,β‐Adjacent Central Chiralities Empowered by Synergistic Pd/Cu Catalysis

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(9)

Опубликована: Янв. 3, 2023

The stereodivergent synthesis of allene compounds bearing α,β-adjacent central chiralities has been realized via the Pd/Cu-catalyzed dynamic kinetic asymmetric alkylation racemic allenylic esters. matched reactivity bimetallic catalytic system enables challenging reaction aryl-substituted acetates with sterically crowded aldimine esters smoothly under mild conditions. Various chiral non-natural amino acids a terminal allenyl group are easily synthesized in high yields and excellent diastereo- enantioselectivities (up to >20 : 1 dr, >99 % ee). Importantly, all four stereoisomers product can be readily accessed by switching configurations two metal catalysts. Furthermore, easy interconversion between uncommon η3 -butadienyl palladium intermediate featuring weak C=C/Pd coordination bond stable Csp2 -Pd is beneficial for transformation process (DyKAT).

Язык: Английский

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Synergistic Dual Catalysis in Stereodivergent Synthesis

ACS Catalysis, Год журнала: 2024, Номер 14(6), С. 3812 - 3844

Опубликована: Фев. 23, 2024

Chiral skeletons with multiple stereogenic centers widely reside in nature and drugs, their relative absolute configuration often determine physiological or pharmacological properties. Stereodivergent synthesis of chiral molecules is not only great significance, but also highly challenging since the formation one diastereomers inherently preferred most asymmetric reactions. dual catalysis, introduced 2013 by Carreira group, perfectly catered to all requirements for full stereoselectivity control given reactions two catalysts are utilized a synergistic way act independently, has now been arguably efficient strategy realize stereodivergent synthesis. This comprehensive review presents an overview development enabled catalysis past ten years, providing readers fundamental attributes as well ability, scope, mechanism, limitations this strategy.

Язык: Английский

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Diastereodivergent Aldol‐Type Coupling of Alkoxyallenes with Pentafluorophenyl Esters Enabled by Synergistic Palladium/Chiral Lewis Base Catalysis

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(33)

Опубликована: Июнь 17, 2022

As a fundamental and synthetically useful C-C bond formation reaction, the aldol reaction is one of most versatile transformations in organic synthesis. However, despite extensive research on asymmetric versions unified method for stereoselective access to complementary syn anti diastereomeric products remains be developed. In this study, we developed synergistic palladium/chiral Lewis base system that overcomes inherent diastereoselectivity bias reactions and, as result, allowed us achieve first diastereodivergent coupling alkoxyallenes with pentafluorophenol esters. Computational studies suggest mechanism involving an intermolecular protonative hydropalladation pathway rather than palladium-hydride migratory insertion pathway. The origin stereochemistry catalysis rationalized by DFT calculations.

Язык: Английский

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Dual Catalysis in Organic Synthesis: Current Challenges and New Trends

European Journal of Organic Chemistry, Год журнала: 2022, Номер 26(1)

Опубликована: Дек. 9, 2022

Abstract Dual catalysis is one of the most powerful strategies for development chemical reactions in organic synthesis. This strategy can be divided into cooperative catalysis, relay and sequential according to actual mode operation communication between catalysts. In recent years, such has been applied a large number studies since it advantages of: 1) increasing reactivity enabling challenging transformations; 2) offering way controlling stereoselectivity asymmetric reactions, which traditional catalytic systems; 3) catalyze stereodivergent synthesis molecules bearing or more stereocenters from same starting materials. Perspective, intends introduce reader EurJOC special collection on Catalysis , aims summarize different categories dual demonstrate their benefits constructing new bonds selective manner. Finally, current challenges trends will also presented.

Язык: Английский

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