Divergent Synthesis of 4-<i>epi</i>-Fagomine, 3,4-Dihydroxypipecolic Acid, and a Dihydroxyindolizidine and Their β-Galactosidase Inhibitory and Immunomodulatory Activities
作者:K. S. Ajish Kumar、J. S. Rathee、M. Subramanian、S. Chattopadhyay
DOI:10.1021/jo400448p
日期:2013.8.2
A divergent asymmetric synthesis of the titled iminosugars has been formulated starting from a chiral homoallyl alcohol as the versatile intermediate. The homoallyl alcohol was prepared by a highlydiastereoselective Barbier reaction on a d-glucose-derived aldehyde. The protection of its hydroxyl function followed by reductive ozonolysis of the olefin and a subsequent one-pot three-step protocol involving