A metallocene-pyrrolidinopyridine nucleophilic catalyst for asymmetric synthesis

Org Lett. 2006 Feb 16;8(4):769-72. doi: 10.1021/ol053050n.

Abstract

[reaction: see text] A highly active chiral 4-aminopyridine nucleophilic catalyst, available in three steps from (S,S)-hexane-2,5-diol, was applied to the asymmetric Steglich rearrangement of O-aceylated azlactones (1 mol % loading, up to 76% ee).