Three Lewis acid catalysed reactions used in a synthesis of the tricyclic core of the marine anti-inflammatory pseudopterosins are reported; the reductive cleavage of an oxirane with inversion, the cyclisation of an α-hydroxy ketenedithioacetal to an arene, and a stereoselective annulation using an allylic sulfone as the electrophile.
报道了三种
路易斯酸催化的反应,用于合成海洋抗炎物质pseudopterosins的
三环核心骨架:
环氧乙烷的还原断裂反应(倒置),α-羟基烯乙二
硫缩醛的环化成
芳香烃反应,以及以烯丙基砜为亲电试剂的选择性环化反应。