作者:Yuan-Yuan Wang、De-Cai Xiong、Qin Li、Yuan Wang、Xin-Shan Ye
DOI:10.1016/j.tet.2012.09.037
日期:2012.11
A new class of pseudoacarviosins with 2,3-anhydro or unsaturated sugar moieties were synthesized efficiently. The designed target disaccharides were constructed by the glycosylation reactions using 2,3-anhydromonosaccharides as glycosyl donors. The glycosylation reactions were carried out in a highly stereoselective manner in most cases, especially when the preactivation protocol was used. The anhydrosugar
有效地合成了具有2,3-脱水或不饱和糖部分的一类新的拟螨类胡萝卜素。通过使用2,3-脱水单糖作为糖基供体的糖基化反应来构建设计的目标二糖。在大多数情况下,尤其是在使用预激活方案时,糖基化反应是以高度立体选择性的方式进行的。在保护基团的脱保护操作中,二糖的脱水糖单元保持完整。此外,通过碱基促进的糖环氧化物的重排,将含有脱水糖部分的二糖顺利地转化为不饱和二糖。