Regioselective Synthesis of Unsymmetrical <i>C</i>-Aryl Glycosides Using Silicon Tethers as Disposable Linkers
作者:David E. Kaelin、Steven M. Sparks、Hilary R. Plake、Stephen F. Martin
DOI:10.1021/ja0375582
日期:2003.10.1
regiochemistry of Diels-Alder reactions between substituted benzynes and glycosyl furans as a key step in the syntheses of unsymmetrical representatives of three major groups of C-aryl glycosides. The cycloaddition precursors were readily prepared by O-alkylation of substituted phenols with various sugar-substituted furylsilane derivatives. Selective deprotonation on the benzene ring of these ethers led to a
硅系链被用来控制取代苄和糖基呋喃之间的 Diels-Alder 反应的区域化学,这是合成三个主要 C-芳基糖苷的不对称代表的关键步骤。环加成前体很容易通过取代酚与各种糖取代呋喃基硅烷衍生物的 O-烷基化来制备。这些醚的苯环上的选择性去质子化导致苯进行分子内 Diels-Alder 反应以产生桥接环加合物。氟化物诱导的硅系链去除和氧杂双环庚二烯亚基的酸催化开环产生作为单一异构体的所需 C-芳基糖苷。