Novel Achiral Biphenol-Derived Diastereomeric Oxovanadium(IV) Complexes for Highly Enantioselective Oxidative Coupling of 2-Naphthols

Chiral binaphthols 3 were obtained by oxidative coupling of 2‐naphthols in the presence of achiral biphenol‐derived diastereomeric VIV oxo complexes. Despite its conformationally flexible biphenyl moiety, the best catalyst 2 (90–97 % ee, 62–99 % yield) exhibits comparable or even higher enantioselec...

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Veröffentlicht in:	Angewandte Chemie International Edition 2002-12, Vol.41 (23), p.4532-4535
Hauptverfasser:	Luo, Zhibin, Liu, Quanzhong, Gong, Liuzhu, Cui, Xin, Mi, Aiqiao, Jiang, Yaozhong
Format:	Artikel
Sprache:	eng
Schlagworte:	asymmetric catalysis binaphthols CC coupling N,O ligands O ligands vanadium
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Chiral binaphthols 3 were obtained by oxidative coupling of 2‐naphthols in the presence of achiral biphenol‐derived diastereomeric VIV oxo complexes. Despite its conformationally flexible biphenyl moiety, the best catalyst 2 (90–97 % ee, 62–99 % yield) exhibits comparable or even higher enantioselectvities than an analogue with an optically pure 1,1′‐binaphthyl group.
ISSN:	1433-7851 1521-3773
DOI:	10.1002/1521-3773(20021202)41:23<4532::AID-ANIE4532>3.0.CO;2-5