作者:Masahiro Miyazawa、Yoshiro Hirai、Ken-ichiro Awasaguchi、Ikuyo Uoya、Koichi Inoue、Koji Nakamura、Hajime Yokoyama、Hiroko Kakuda
DOI:10.1055/s-0030-1258560
日期:2010.10
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。