(−)-lauthisan as well as formal synthesis of (+)-lauthisan have been accomplished. The key step involves an unusually regioselective CC bond forming cyclization of acyclic ether to give a 8-membered cyclic ether. The regioselective cyclization is based on allylic substituent controlled intramolecular alkylation of allylic carbonate which is catalyzed by Pd(0).
(-)-月桂聚糖的全合成以及(+)-月桂聚糖的形式合成已经完成。关键步骤涉及非常规的区域选择性CC键,形成无
环醚的环化,生成8元
环醚。区域选择性环化是基于由Pd(0)催化的烯
丙基碳酸酯的烯丙基取代基控制的分子内烷基化。