6'-对位取代苯乙烯基吲哚啉螺吡喃的合成

利用2-亚甲基吲哚啉和取代水杨醛缩合得到十三种新的烷基苯乙烯基吲哚啉螺苯并吡喃。在苯并吡喃部分含有硝基的螺吡喃显示出逆光致变色行为，其它的则为普通光致变色化合物。同时，结果表明，化合物异构体的稳定性不仅取决于化合物本身的结构，而且还取决于介质环境的影响。

Synthesis of 6'-substituted styryl indoline spirobenzopyrans

Thirteen new compounds of the alkyl styryl indoline spirobenzopyrans were synthesized from the condensation of 2-methylene indoline with the designed salicylaldehyde. The spiropyrans with a nitro group at the benzopyran moiety showed reverse photochromic behavior, others were normal photochromic compounds. Meanwhile, it was found that the stabilization of the isomers of the compounds was not noly dependent upon the structure of compounds but also on the medium.