Chemistry Letters, Vol.29, No.4, 432-433, 2000
Rhamnosylation reaction with a phenyl 1-thiorhamnoside and a rhamnosyl fluoride which have C-4(1) conformation
Rhamnosylation reaction with a phenyl 1-thiorhamnoside and a rhamnosyl fluoride that has chair conformation with more axial substituents (C-4(1)) is described. Flipping of the ring conformation changed the high alpha-selectivity of the general rhamnosylation reaction. More beta-rhamnosides were afforded under several conditions.