time. The key strategy features a coupling reaction between thiol derivatives and a diiodide counterpart. The newly designed thiol coupling partner presents high chemical stability, while the diiodide partner could be easily obtained with increased overall yields compared with conventional routes. The intermolecular nucleophilic substitution reaction followed by a diastereoselective intramolecular cyclization
首次报道了一种高效,多样化的方法,用于合成最初从S藜属植物中分离的所有四种
脱-O-磺化α型α-
葡萄糖苷酶
抑制剂。关键策略是
硫醇衍
生物与二
碘化物对应物之间的偶联反应。新设计的
硫醇偶合剂具有较高的
化学稳定性,而与常规方法相比,二
碘化物偶合剂可以轻松获得,总收率更高。分子间亲核取代反应,随后进行非对映选择性分子内环化,提供了目标五元sulf盐结构,该结构以α-方向连接至多羟基化的侧链部分。