Two concise synthetic routes, being different in the glycosylation sequence, toward ginsenoside Ro (1) are developed. These syntheses feature the elaboration of the glucuronide residue at a later stage via the TEMPO-mediated selective oxidation and the installation of AZMB as a benzoylic neighboring participating group capable of being selectively removed afterward.
我们开发了两条简明的合成路线,它们在糖基化顺序上有所不同,最终都导向
人参皂苷 Ro (1)。这些合成路线的特点是,在后期通过
TEMPO 介导的选择性氧化来处理
葡萄糖醛酸残基,并引入 A
ZMB 作为邻苯甲酰基参与基团,以便日后选择性去除。