Asymmetric syntheses of (–)-lentiginosine and an original pyrrolizidinic analogue thereof from a versatile epoxyamine intermediate
作者:Tahar Ayad、Yves Génisson、Michel Baltas
DOI:10.1039/b505303j
日期:——
Ready access to natural (â)-lentiginosine and its pyrrolizidinic analogue from a chiral vinylic epoxyamine in a straightforward five-step sequence is presented. Careful use of the RCM reaction on aminotriols 5 and 6 constitutes the key feature of the synthetic pathway. The α-amyloglucosidase inhibitory activities of the target compounds were evaluated and showed that the more easily accessible pyrrolizidinic analogue possesses an inhibitory activity quite similar to that of (â)-lentiginosine.
本文介绍了如何通过简单的五步顺序,从手性乙烯基环氧胺中获得天然 (â)-lentiginosine 及其吡咯烷类似物。在氨基三醇 5 和 6 上谨慎使用 RCM 反应是该合成途径的关键特征。对目标化合物的δ-淀粉葡萄糖苷酶抑制活性进行了评估,结果表明更容易获得的吡咯烷类似物具有与(â)-龙胆苷类似的抑制活性。