Indirect synthetic route to α-<scp>l</scp>-fucosides <i>via</i> highly stereoselective construction of α-<scp>l</scp>-galactosides followed by C6-deoxygenation
We developed an indirect synthetic method for α-L-fucosides. Based on the fact that L-fucose is 6-deoxy-L-galactose, our strategy consists of the stereoselective construction of α-L-galactoside and its conversion to α-L-fucoside via C6-deoxygenation. The formation of α-L-galactoside is strongly directed using 4,6-O-di-tert-butylsilylene(DTBS)-protected L-galactosyl donors. The DTBS-directed α-L-galactosylation