New tetracyclic psoralen-like compounds have been synthesized, which are characterized by two furan rings angularly condensed on the coumarin nucleus and are therefore called difurocoumarins. This structural feature may favour the intercalation into the DNA helix and then monofunctionally photoreaction with DNA bases. Their synthesis started from 5,7-dihydroxy-4-methylcoumarin, which was condensed
已经合成了新的类似四环
补骨脂素的化合物,其特征在于两个
呋喃环成角度地缩合在
香豆素核上,因此被称为双
呋喃香豆素。这种结构特征可能有利于插入DNA螺旋中,然后与DNA碱基发生单功能光反应。它们的合成从与α-卤代酮缩合的5,7-二羟基-4-甲基
香豆素开始。然后将得到的酮醚环化,得到标题化合物。