Spiro C-arylglycoriboside was synthesized in 21 steps via Pd(II)-catalyzed spirocyclization as a key reaction. Hemiketal was obtained in 47% overall yield from cis-2-butene-1,4-diol and spirocyclized with PdCl 2 (PhCN) 2 in dilute THF solution (0.01 M) to afford the 1,6-dioxaspiro[4.4]nonane skeleton in high yield. The spirocyclo adduct was transformed into spiro C-arylglycoriboside in five steps.
Spiro C-芳基糖基糖苷是通过 Pd(II) 催化的螺环化反应分 21 步合成的。从顺式-
2-丁烯-1,4
-二醇以 47% 的总收率获得半
缩酮,并在稀 THF 溶液 (0.01 M) 中用 PdCl 2 (PhCN) 2 进行螺环化,得到
1,6-二氧杂螺[4.4]壬烷骨架高产。螺环加合物通过五个步骤转化为螺环 C-芳基糖苷。