STEREOSELECTIVE SYNTHESIS OF 5 AND OR 6 MEMBERED RING HYDROXYLACTONESOBTAINED BY LEWIS-ACID MEDIATED REACTION OF GAMMA,DELTA-EPOXY-BETA-HYDROXYESTERS - ACCESS TO 5-METHYLATED 2-DEOXYSUGARS/
K. Nacro et al., STEREOSELECTIVE SYNTHESIS OF 5 AND OR 6 MEMBERED RING HYDROXYLACTONESOBTAINED BY LEWIS-ACID MEDIATED REACTION OF GAMMA,DELTA-EPOXY-BETA-HYDROXYESTERS - ACCESS TO 5-METHYLATED 2-DEOXYSUGARS/, Tetrahedron, 53(2), 1997, pp. 659-672
A stereoselective route to six and/or five membered ring lactones from
optically active gamma,delta-epoxy-beta-hydroxyesters obtained from n
erol and geraniol has been developed. The intramolecular cyclization b
y epoxide ring opening occurred via activation of 6-endo over the usua
lly favoured 5-exo, and the application of this technology to the ster
eocontrolled synthesis of 5-methylated 2-deoxysugars was achieved. Cop
yright (C) 1996 Elsevier Science Ltd