A divergent, short, and stereoselective approach to pyrrolidine iminosugars: synthesis of 1,4-dideoxy-1,4-imino-derivatives of d-allitol, d-ribitol, ethyl-erythritol, and (−)-2,3-trans-3-4-cis-dihydroxyproline

A highly stereoselective addition of Grignard reagent on lactamine for the synthesis of 1,4-dideoxy-1,4-imino-derivatives of d-allitol, d-ribitol, ethyl-erythritol, and (−)-2,3-trans-3-4-cis-dihydroxyproline has been described from commercially available d-ribose as a starting material.