作者:Sheng Yang、Chun-Jui Chu、Todd L. Lowary
DOI:10.1021/acs.orglett.2c02349
日期:2022.8.5
We report the de novo asymmetric synthesis of the 3,6-dideoxy sugars abequose, paratose, and tyvelose from 2-acetylfuran. Conversion of this readily available ketone to a pyranone derivative was followed by transformation to either an α- or β-glycoside via diasteroselective acylation. Michael addition at C2 controlled primarily by the C1 configuration in the glycoside produced 3,6-dideoxy-4-keto sugars
我们报告了从 2-乙酰呋喃中 3,6-双脱氧糖 abequose、paratose 和 tyvelose 的从头不对称合成。将这种容易获得的酮转化为吡喃酮衍生物,然后通过非对映选择性酰化转化为α-或β-糖苷。主要由糖苷中的 C1 构型控制的 C2 处的迈克尔加成产生 3,6-二脱氧-4-酮糖,可以还原并转化为完全脱保护的单糖或糖基供体的直接前体。