Asymmetric routes to azasugars from chiral bicyclic lactams. Synthesis of 1,4-dideoxy-1,4-imino-D-lyxitol; L-deoxymannojirimycin; rhammo-1-deoxynojirimycin and 1-deoxy-6-epicastanospermine.
Ai. Meyers et al., Asymmetric routes to azasugars from chiral bicyclic lactams. Synthesis of 1,4-dideoxy-1,4-imino-D-lyxitol; L-deoxymannojirimycin; rhammo-1-deoxynojirimycin and 1-deoxy-6-epicastanospermine., TETRAHEDRON, 55(29), 1999, pp. 8931-8952
By employing the appropriate chiral bicyclic lactams, the asymmetric total
synthesis of four enantiopure azasugars mentioned in the title were success
fully achieved. A series of diastereoselective oxidations (OsO4/NMO) follow
ed by diastereoselective reductions (BH3, 9-BBN) gave good yields of the tr
isubstituted (16) and tetrasubstituted (2,3,4) pyrrolidine and piperidines
respectively. (C) 1999 Elsevier Science Ltd. All rights reserved.