Oxidant-Controlled Heck-Type <i>C</i>-Glycosylation of Glycals with Arylboronic Acids: Stereoselective Synthesis of Aryl 2-Deoxy-<i>C</i>-glycosides
作者:De-Cai Xiong、Li-He Zhang、Xin-Shan Ye
DOI:10.1021/ol900273d
日期:2009.4.16
Oxidative Heck-type C-glycosylations of glycals with various arylboronic acids using Pd(OAc)2 as catalyst in the presence of oxidant were developed. The corresponding ketone, enol ether, and enone types of C-glycosides were predictably obtained with benzoquinone (BQ), Cu(OAc)2/O2, and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as oxidants, respectively. This method provides a simple, mild, and
在氧化剂存在下,使用Pd(OAc)2作为催化剂,用各种芳基硼酸对糖类进行了氧化性的Heck型C-糖基化反应。用苯醌(BQ),Cu(OAc)2 / O 2和2,3-二氯-5,6-二氰基-1,4-苯醌可预期获得相应的酮,烯醇醚和烯酮类型的C-糖苷(DDQ)作为氧化剂。此方法提供了一种简单,轻度,和芳基2-脱氧的立体选择性合成Ç -glycosides。