On treatment with acid, the well-known epoxy coumarin phebalosin (I) undergoes rearrangement to afford murralogin, a naturally occurring coumarin bearing an unusual isoprenoid unit. The structure of murralogin is reviewed, based on the hypothetical mechanism of rearrangement, and finally revised to (V) by X-ray crystalography.
在用酸处理时,著名的环氧香豆素雉豆苷 (I) 会发生重排反应,生成一种天然香豆素--含有一个不寻常的异戊二烯单元的 murralogin。根据假设的重排机理,对 murralogin 的结构进行了回顾,并通过 X 射线晶体学最终修正为 (V)。