http://www.cnr.it/ontology/cnr/individuo/prodotto/ID180805
Diastereoselective desymmetrization of meso bis(phenylsulfonyl) polycyclic alkenes promoted by C2 symmetric chiral diolates: direct accessto optically pure ketals and ketones (Articolo in rivista)
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- Label
- Diastereoselective desymmetrization of meso bis(phenylsulfonyl) polycyclic alkenes promoted by C2 symmetric chiral diolates: direct accessto optically pure ketals and ketones (Articolo in rivista) (literal)
- Anno
- 2005-01-01T00:00:00+01:00 (literal)
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- Cossu S; Peluso P (literal)
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- http://tradescienceinc.com/index.php?option=com_content&view=article&id=2021&Itemid=116 (literal)
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- Dipartimento di Chimica, Università Ca' Foscari di Venezia, Dorsoduro 2137, I-30123 Venezia, Italy; Istituto di Chimica Biomolecolare, UOS di Sassari, Traversa La Crucca 3, Regione Baldinca, Li Punti, I-07100 Sassari, Italy (literal)
- Titolo
- Diastereoselective desymmetrization of meso bis(phenylsulfonyl) polycyclic alkenes promoted by C2 symmetric chiral diolates: direct accessto optically pure ketals and ketones (literal)
- Abstract
- The desymmetrization of meso 1,2-bis(phenylsulfonyl) substituted bridged polycyclic alkenes promoted by C2 symmetric chiral diolates is reported. The phenylsulfonyl group exerts an electronwithdrawing effect onto the C-C double bond, making the alkenylic function a good Michael acceptor: enantiotopic Csp2 react with the enantiopure nucleophile which has been used in stoichiometric amount. The stereoselective process leadsto the formation of optically pure a-phenylsulfonylsubstituted polycyclic ketals, which are valuable intermediate in the synthesisof polycyclic a-phenylsulfonylketones and ketones.The kinetic resolution of a racemic mixture of a tolylsulfonulsubstituted polycyclic alkene is also reported. (literal)
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