Asymmetric synthesis of both enantiomers of 1,1′-(2′,4-dihydroxy-6,6′-dimethoxy-2,4′-dimethylbiphenyl-3,3′-diyl)bisethanone allows the formal synthesis of both enantiomers of 4,4′,7,7′-tetramethoxy-5,5′-dimethyl-6,8′- bicoumarin (desertorin C).
1,1′-(2′,4-二羟基-6,6′-二甲氧基-2,4′-
二甲基联苯-3,3′-二基)
双乙酮的两种对映体的不对称合成使得4,4′,7,7′-四甲氧基-5,5′-二甲基-6,8′-双
香豆素(沙漠美素C)的正式合成成为可能。