| Autor: |
Zhang, Y., Yeung, S.-M., Wu, H., Heller, D. P., Wu, C., Wulff, W. D. |
| Zdroj: |
Organic Letters; May 2003, Vol. 5 Issue: 11 p1813-1816, 4p |
| Abstrakt: |
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). |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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