中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-chlorophenyl 1-thio-β-D-galactopyranoside | 41341-59-7 | C12H15ClO5S | 306.767 |
A β-GlcNAc-LeX tetrasaccharides and another α-Gal-LeX analog have been synthesized for studying interaction with toxins produced by the human pathogen Clostridium difficile. LeX-based trisaccharides bearing either a 2-azidoethyl or a 6-azidohexyl aglycone have been employed in the total synthesis to afford the desired tetrasaccharides. Interestingly, during the final catalytic hydrogenation step to remove benzyl and benzylidene protecting groups and simultaneously reduce azide functionality, partial N-methylations were observed. The N-methylations appear to be a general issue with catalytic hydrogenation of azides in methanol.