The construction of dinaphtho[2,1-b;2′,3′-d]furan-6-ol was developed via a dehydration reaction involving two molecules of 2,3-dihydroxynaphthalene in the presence of a strong acid. Starting from the dinaphthofuran, a variety of butterfly shaped derivatives were synthesized. The optical properties of these compounds were investigated with special attention to the dihedral angle formed by adjacent dinaphthofuran rings and/or the sizes of the fused aromatic rings.

中文翻译：

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蝶形膨化萘呋喃衍生物的合成及性能

通过在强酸存在下涉及两个分子的2,3-二羟基萘的脱水反应，开发了萘并[ 2,1 - b ; 2'，3' - d ]呋喃6-ol的结构。从二萘并呋喃开始，合成了多种蝴蝶状衍生物。研究这些化合物的光学性质时，应特别注意相邻邻萘并呋喃环形成的二面角和/或稠合芳环的大小。