烷基取代萘并吡喃的合成及其光致变色性

Synthesis and Photochromic Properties of Alkyl-substituted 3H-naphthopyrans

从2-萘酚出发经多步反应合成出6-己基-2-萘酚,再由6-己基-2-萘酚分别与两种炔醇缩合,得到了两种萘环上连有柔性长链的萘并吡喃,并对它们的光致变色性质和溶解性能进行了研究,发现它们不仅具有较好的光致变色性质,光成色和光漂白次数可达150次,并在常用有机溶剂正己烷、乙醚、石油醚中具有良好的溶解性,而分子结构上没有柔性长链的萘并吡喃不溶入上述有机溶剂。两化合物的结构经质谱、红外光谱、UV-Vis吸收光谱及1H NMR确证。

Two novel 3H - naphtho[2,1 - b]pyrans with a long soft chain were synthesized by the condensation of 6 - hexylnaphthen - 2 - ol with prop - 2 - yn - 1 - ols. The introduction of the long alkyl group is to improve the solubility of naphthopyrans . The two compounds were characterized by MS, IR, UV - Vis, ^1H NMR. Photochromic properties and solubility were also investigated.