Pd-catalyzed asymmetric intermolecular hydroalkoxylation of allene: an entry to cyclic acetals with activating group-free and flexible anomeric control

J Am Chem Soc. 2014 Oct 1;136(39):13618-21. doi: 10.1021/ja508587f. Epub 2014 Sep 19.

Abstract

A ligand-directed metal-catalyzed asymmetric intermolecular hydroalkoxylation of alkoxyallene is reported. Combined with ring-closing-metathesis, this reaction offers a new atom-efficient synthetic method toward various cyclic acetals with elaborate anomeric control. Synthetic utility of the reaction was demonstrated by the atom-efficient and stereodivergent access to various mono- and disaccharides.