SYNTHESIS AND HYDROGENOLYSIS OF THE METHYLENE, ETHYLIDENE, ISOPROPYLIDENE, AND DIASTEREOISOMERIC 1-PHENYLETHYLIDENE ACETALS OF β-L-ARABINO- AND α-L-RHAMNOPYRANOSIDE DERIVATIVES

Article abstract of DOI:10.1016/0008-6215(85)85218-6

Both diastereoisomers of 1-phenylethylidene acetals (acetophenone acetals) of methyl and benzyl β-L-arabinopyranoside and α-L-rhamnopyranoside were prepared.Acetal-exchange reactions gave only the endo-phenyl isomers; their 2-O- and 4-O-acetyl derivatives