A simple and efficient method was developed for the synthesis of substituted naphtho[1,2-b]benzofuran-7(8H)-ones based on the photorearrangement reaction of 4H-chromen-4-one derivatives. The studied reaction includes the photocyclization of the hexatriene system, [1,9]-H-sigmatropic rearrangement and heterocyclic ring opening. The starting terarylenes were prepared via a new three-component tandem condensation of 3-(dimethylamino)-1-(2-hydroxyaryl)prop-2-en-1-ones, arylglyoxals and cyclic 1,3-diketones.

中文翻译：

---

通过4H-色烯-4-酮衍生物的光诱导重排合成取代的萘并[1,2-b]苯并呋喃-7（8H）-酮

基于4 H -chromen-4-one衍生物的光重排反应，开发了一种简单高效的合成取代萘[1,2 - b ]苯并呋喃-7（8 H）-的方法。研究的反应包括己三烯系统的光环化，[1,9] -H- σ重排和杂环开环。起始亚芳基是通过3-（二甲基氨基）-1-（2-羟基芳基）丙-2-烯-1-酮，芳基乙二醛和环状1,3-二酮的新三组分串联缩合制备的。