2003 Other naphthalene derivatives

Other naphthalene derivativesQ 1020 Highly Enantioselective Deracemization of Linear and Vaulted Biaryl Ligands.

— A first copper-mediated deracemization of biaryl ligands VANOL (Ia) and VAPOL (Ib) in the presence of (-)-sparteine is described. The procedure includes the in situ gen-eration of copper(II) and leads to the reproducible formation of the (S)-enantiomers in greater than 99% e.e. from the racemates. — (ZHANG, Y.; YEUNG, S.-M.; WU, H.; HELLER, D. P.; WU, C.; WULFF*, W. D.; Org. Lett. 5 (2003) 11, 1813-1816; Dep. Chem., Mich. State Univ., East Lansing, MI 48824, USA; Eng.) — Steudel

38- 074