9 0 attached to the 2-position of the nucleus. The important biological activity of this family of antibiotics makes these substances attractive subjects for synthetic study. In a series of recent communications,@ we have reported the development of general synthetic methods which can be used to synthesize complex natural polycyclic aromatic systems while maintaining absolute control over the regiochemistry of introduced functionalities. We ...
![(1'E)-5-methyl-2-(1'-methyl-1'-propenyl)-7,11,12-trimethoxy-4H-anthra[1,2-b]pyran-4-one Structure](https://image.chemsrc.com/caspic/404/73713-45-8.png)
![2-[(E)-but-2-en-2-yl]-11-methoxy-5-methylnaphtho[2,3-h]chromene-4,7,12-trione Structure](https://image.chemsrc.com/caspic/187/73713-33-4.png)
