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Being cagey: More than two chiral Co (salen) catalyst molecules can be confined in one nanocage of SBA-16 by reducing the pore entrance size by silylation. The Co (salen) /SBA-16 catalysts with more than two Co (salen) complexes in each cage show a significantly enhanced cooperative activation effect and exhibit much higher activity than the homogeneous Co (salen) catalyst in the hydrolytic kinetic resolution of epoxides (see scheme). Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2007/z701747ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Yang et al. (Tue,) studied this question.