Two alternative procedures, both starting from easily accessible- tetramethylanthracenes and employing the Diels-Alder addition as the key reaction step(s), have been examined in the synthesis of the title compounds.
已在标题化合物的合成中检验了两种替代方法,均从容易获得的四甲基
蒽开始,并采用 Diels-Alder 加成作为关键反应步骤。