General and Stereocontrolled Approach to the Chemical Synthesis of Naturally Occurring Cyanogenic Glucosides
作者:Birger L. Møller、Carl E. Olsen、Mohammed S. Motawia
DOI:10.1021/acs.jnatprod.5b01121
日期:2016.4.22
An effective method for the chemical synthesis of cyanogenic glucosides has been developed as demonstrated by the synthesis of dhurrin, taxiphyllin, prunasin, sambunigrin, heterodendrin, and epiheterodendrin. O-Trimethylsilylated cyanohydrins were prepared and subjected directly to glucosylation using a fully acetylated glucopyranosyl fluoride donor with boron trifluoride–diethyl etherate as promoter
已经开发了一种化学合成氰基葡萄糖苷的有效方法,如合成杜克林,滑石粉,甜菜碱,三香皂苷,异登花青素和表杂登花青素所证明的。Ø制备了三甲基甲硅烷基化的氰醇,并使用完全乙酰化的吡喃葡萄糖基氟供体与三氟化硼-乙醚混合作为助催化剂,直接进行了糖基化反应,得到了色谱分离的相应乙酰化氰基葡萄糖苷的差向异构混合物。使用三氟甲磺酸/ MeOH /离子交换树脂系统将分离的差向异构体脱保护,而氰醇功能没有任何差向异构。该方法是立体控制的,并且提供了化学合成其他天然存在的氰基葡萄糖苷的有效方法,包括具有更复杂糖苷配基结构的那些。