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Catalytic enantioselective Michael addition of 2-substituted benzofuran-3-ones to 2-enoyl pyridines
Koilpitchai Sivamuthuraman,
Published in Royal Society of Chemistry
2019
PMID: 31328210
Volume: 17
   
Issue: 30
Pages: 7166 - 7171
Abstract
An organocatalytic diastereo- and enantioselective synthesis of 2,2′-disubstituted benzofuran-3-ones bearing adjacent quaternary and tertiary stereocenters has been achieved through Michael addition of 2-substituted benzofuran-3-ones to 2-enoyl pyridines. Both the enantiomeric forms of the major diastereomer were obtained using l-proline derived squaramide and quinine derived bis squaramide with excellent yield (up to 98%) and stereoselectivities (up to 97:3 dr and 98% ee). The control experiment revealed that the presence and position of nitrogen atoms in the 2-enoylpyridine have played a crucial role in the stereochemical outcome of the product. © 2019 The Royal Society of Chemistry.
About the journal
JournalData powered by TypesetOrganic and Biomolecular Chemistry
PublisherData powered by TypesetRoyal Society of Chemistry
ISSN14770520
Open AccessNo
Concepts (12)
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    Addition reactions
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    Pyridine
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    Selective catalytic reduction
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    Control experiments
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    Diastereomers
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    Enantioselective michael addition
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    Enantioselective synthesis
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    Michael additions
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    Nitrogen atom
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    Organocatalytic
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    TERTIARY STEREOCENTERS
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    Enantioselectivity