Highly enantioselective organocatalytic direct aldol reaction in an aqueous medium

Org Lett. 2007 Jun 21;9(13):2593-5. doi: 10.1021/ol071013l. Epub 2007 May 23.

Abstract

We have demonstrated that small organic molecules 1 and 2 catalyzed the direct aldol reaction of both acyclic and cyclic ketones with different aldehydes in an excess of water/brine. Excellent enantioselectivities up to >99% and diastereoselectivities up to 99% with very good yields were obtained by using much lower catalyst loadings (0.5 mol %).