ChemInform Abstract: Achiral Counterion Control of Enantioselectivity in a Broensted Acid-Catalyzed Iodolactonization

The combination of a chiral ammonium cation and the achiral triflimide anion present in catalyst (I) affords the highest enantioselectivity in the iodolactonization reaction of acid (IIa) compared to eight other combinations of the cation with achiral sulfonate counterions.

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Bibliographische Detailangaben
Veröffentlicht in:	ChemInform 2012-09, Vol.43 (37), p.no-no
Hauptverfasser:	Dobish, Mark C., Johnston, Jeffrey N.
Format:	Artikel
Sprache:	eng
Schlagworte:	diastereoselective syntheses diastereoselective syntheses, enantioselective syntheses (incl. cis/trans‐isomerism) enantioselective syntheses (incl. cis/trans-isomerism) halogenation pyran derivatives ring closure reactions
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Beschreibung
Zusammenfassung:	The combination of a chiral ammonium cation and the achiral triflimide anion present in catalyst (I) affords the highest enantioselectivity in the iodolactonization reaction of acid (IIa) compared to eight other combinations of the cation with achiral sulfonate counterions.
ISSN:	0931-7597 1522-2667
DOI:	10.1002/chin.201237128