Abstract The first total syntheses of ochnaflavone, an asymmetric biflavone consisting of apigenin and luteolin moieties, and the permethyl ether of 2, 3, 2'', 3''- tetrahydroochnaflavone have been achieved. The key steps in the synthesis of ochnaflavone were the formation of a diaryl ether and ring cyclization of an ether-linked dimeric chalcone to assemble the two flavone nuclei. Optimal experimental conditions for ...
![2-[3-[4-(5,7-dimethoxy-4-oxo-chromen-2-yl)phenoxy]-4-methoxy-phenyl]-5,7-dimethoxy-chromen-4-one结构式](https://image.chemsrc.com/caspic/146/49619-88-7.png)
