Highly Enantioselective Deracemization of Linear and Vaulted Biaryl Ligands
Organic Letters2003Vol. 5(11), pp. 1813–1816
Citations Over TimeTop 10% of 2003 papers
Abstract
[reaction: see text] A copper-mediated deracemization of the vaulted biaryl ligands VANOL and VAPOL can be readily achieved in the presence of (-)-spartiene. The optimal procedure involves the in situ generation of copper(II) and leads to the reproducible formation of (S)-VANOL and (S)-VAPOL in greater than 99% ee from the racemates. This method is superior to existing procedures for BINOL (92% ee).
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