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Creators/Authors contains: "Odagi, Minami"

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  1. ; ; ; ; (, Chemical Science)
    A new conjugate-base-stabilized carboxylic acid containing a 3,5-bis(SF5)phenylthiourea functionality catalyses challenging one-pot condensations/6π-electrocyclizations of hydrazines and α,β-unsaturated ketones. 
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  2. ; ; ; ; ; ; ; ; (, Journal of the American Chemical Society)
    null (Ed.)
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  3. ; ; ; ; ; ; (, Angewandte Chemie International Edition)
    Abstract A readily accessible conjugate‐base‐stabilized carboxylic acid (CBSCA) catalyst facilitates highly enantioselective [4+2] cycloaddition reactions of salicylaldehyde‐derived acetals and cyclic enol ethers, resulting in the formation of polycyclic chromanes with oxygenation in the 2‐ and 4‐positions. Stereochemically more complex products can be obtained from racemic enol ethers. Spirocyclic products are also accessible. 
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  4. ; ; ; ; ; ; ; ; (, Angewandte Chemie)
    Abstract Acyclic ketone‐derived oxocarbenium ions are involved as intermediates in numerous reactions that provide valuable products, however, they have thus far eluded efforts aimed at asymmetric catalysis. We report that a readily accessible chiral carboxylic acid catalyst exerts control over asymmetric cyclizations of acyclic ketone‐derived trisubstituted oxocarbenium ions, thereby providing access to highly enantioenriched dihydropyran products containing a tetrasubstituted stereogenic center. The high acidity of the carboxylic acid catalyst, which exceeds that of the well‐known chiral phosphoric acid catalyst TRIP, is largely derived from stabilization of the carboxylate conjugate base through intramolecular anion‐binding to a thiourea site. 
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  5. ; ; ; ; ; ; ; ; (, Angewandte Chemie International Edition)
    Abstract Acyclic ketone‐derived oxocarbenium ions are involved as intermediates in numerous reactions that provide valuable products, however, they have thus far eluded efforts aimed at asymmetric catalysis. We report that a readily accessible chiral carboxylic acid catalyst exerts control over asymmetric cyclizations of acyclic ketone‐derived trisubstituted oxocarbenium ions, thereby providing access to highly enantioenriched dihydropyran products containing a tetrasubstituted stereogenic center. The high acidity of the carboxylic acid catalyst, which exceeds that of the well‐known chiral phosphoric acid catalyst TRIP, is largely derived from stabilization of the carboxylate conjugate base through intramolecular anion‐binding to a thiourea site. 
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