A straightforward chiral pool synthesis for the glycosidase inhibitor calystegine A7 (isolated from Lycium chinense) from methyl α-d-glucopyranoside is described. Keysteps of this synthesis include a ultrasound assisted Zn-mediated tandem ring opening reaction followed by a Grubbs' catalyst mediated ring closure metathesis.
描述了由甲基α-d-吡喃葡萄糖苷直接合成糖苷酶抑制剂calystegine A 7(从枸杞中分离)的手性池。该合成的关键步骤包括超声辅助的Zn介导的串联开环反应,然后进行Grubbs催化剂介导的闭环复分解反应。