Efficient Synthesis of an Allose-Containing Analogue of the Phytoalexin-Elicitor Glucohexaose and Its Dodecyl Glycoside
作者:Xiangdong Mei、Jun Ning、Hongju Ma、Dewen Qiu、Qianfei Zhao、Yonghong Li
DOI:10.1055/s-0028-1083292
日期:2009.1
analogue 2 of the phytoalexin elicitor β-(1→3)-branched β-(1→6)-linked glucohexatose and its dodecyl glycoside 3 has been regio- and stereospecifically synthesized. As a typical example of the method, the synthesis of 2 was achieved via coupling of the trisaccharide donor 2,3,4,6-tetra-O-benzoyl-β-d-glucopyranosyl-(1→3)-[2,3,4,6-tetra-O-benzoyl-β-d-glucopyranosyl-(1→6)]-1,2-O-isopropylidene-α-d-allopyranosyl
已经在区域和立体上特异性地合成了植物抗毒素素引发剂β-(1→3)-分支的β-(1→6)-连接的葡萄糖己糖的含Allose的类似物2和其十二烷基糖苷3。作为该方法的典型实例,通过三糖供体2,3,4,6-四-O-苯甲酰基-β - d-吡喃葡萄糖基- (1→3)-[2,3]的偶联来完成2的合成。具有三糖受体的,4,6-四-O-苯甲酰基-β - d-吡喃吡喃糖基-((1→6)]-1,2 - O-异亚丙基-α - d-戊吡喃糖基三氯乙酰亚胺酸酯(9)。供体很容易从1,2:5,6-二-O-异亚丙基-α-制备d-铝呋喃糖(5)和2,3,4,6-四-O-苯甲酰基-α - d-吡喃葡萄糖基三氯乙酰亚胺酸酯(4)以区域和立体选择性的方式。 寡糖-合成-糖苷-糖基化-立体选择性