By means of a total synthesis, the absolute configuration of the naturally occurring macrodiolide pyrenophorol has been established. An essential step is the photo-induced rearrangement of an α,β-epoxy diazomethyl ketone to produce a 4-hydroxy-2-alkenoate. The two lactone units have been introduced in two successive steps.
通过全合成,已经建立了天然存在的大
环己二醇吡啶并富
酚的绝对构型。重要的步骤是光诱导α,β-环氧重氮甲基酮的重排以产生
4-羟基-2-链烯酸酯。在两个连续的步骤中引入了两个内酯单元。