Cat‐in‐a‐Cup: Facile Separation of Large Homogeneous Catalysts

Abstract

A cat with nine lives: Catalyst separation and recycling is the bane of homogeneous catalysis. This problem is addressed by a two-layered ceramic membrane cylinder that allows the diffusion of reactants and products in and out, but keeps the catalyst trapped. The concept is demonstrated for the enantioselective transfer hydrogenation of acetophenone to (S)-phenylethyl alcohol with large molecular catalysts anchored on Fréchet-type dendrimers. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z801116_s.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.