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. Author manuscript; available in PMC: 2012 Apr 6.
Published in final edited form as: J Am Chem Soc. 2011 Jan 25;133(6):1650–1653. doi: 10.1021/ja1093309

Figure 2.

Figure 2

(a) x-ray crystal structure of Rh2(S-NTTL)4. (b) Asymmetric induction may be explained by approach of the indole to the si-face of the Rh-carbene, with subsequent aromatization and stereoretentive protonation. (c) Alternatively, asymmetric induction may occur via dynamic kinetic resolution, provided that equilibrium between diastereomeric Rh-enolates G and G’ is fast relative to the rate of protonation.