Anodic oxidation of chiral sulfinylamines:: a new route to highly diastereoselective α-alkylation of piperidine

The anodic oxidation of some chiral non-racemic N-arylsulfinyl piperidines was investigated and for the first time alpha methoxylated sulfinyl piperidines were obtained. The so-formed compounds are equivalent of chiral N-sulfinyliminiums and used as new intermediates for the preparation of chiral alpha-substituted piperidine derivatives in good yield and diastereoselectivity. (c) 2005 Elsevier Ltd. All rights reserved.