作者:Pascal Ellerbrock、Nicolas Armanino、Dirk Trauner
DOI:10.1002/anie.201407088
日期:2014.12.1
oxidative dimerization of the aromatic polyketide epicoccine as the key step. Dibefurin is proposed to be related to epicolactone, a complex yet racemic fungal metabolite that has recently been discovered. Attempts to access epicolactone from epicoccine and epicoccone B resulted in an unusual dimer that is formed through a hetero‐Diels–Alder reaction of a para‐quinone methide with an ortho‐quinone.
Dibefurin是一种C i对称的天然产物,可作为钙调磷酸酶磷酸酶的抑制剂。据报道该化合物的六步合成反应,其关键步骤是芳族聚酮缩酮表球菌素的氧化二聚作用。提议将双倍红素与表古内酯(epicolactone)相关,后者是最近发现的复杂但外消旋的真菌代谢产物。尝试从表球菌素和表球菌素B中获得表古内酯导致了异常的二聚体,该二聚体是由对醌甲基化物与邻醌的异狄尔斯-阿尔德反应形成的。