β‐D‐GlcpA‐(1→2)‐[β‐D‐Xylp‐(1→2)‐α‐D‐Manp‐(1→3)]‐α‐D‐Manp‐(1→3)‐α‐D‐Manp, the repeatingunit of the exopolysaccharide from Cryptococcus neoformans serotype D, was synthesized as its 4‐methoxyphenyl glycoside. The approach presented here also provides a route to the synthesis of more complex repeatingunits of glucuconoxylomannan (GXM) of C. neoformans serotypes A–C.
β - D- Glc p A-(1→2)-[ β - D- Xyl p-(1→2)-α - D- Man p-(1→3)]- α - D- Man p-( 1→3) - α - d -Man p,从胞外多糖的重复单元新型隐球菌血清型d,合成作为它的4-甲氧基苯基糖苷。这里介绍的方法还提供了一条途径,可以合成更复杂的C. neoformans血清型A–C的葡糖康考葡甘露聚糖(GXM)重复单元。