1,3-二-(3,3-二甲基-2-甲烯假吲哚)方酸菁染料的合成及其晶体结构

合成了两个新型方酸菁染料3和5。在催化下,2,3,3-三甲基假吲哚不需N- 烷基化,可直接与方酸反应。反应过程中发生了明显的质子转移。结晶学数据表明,分子3的整体位于同一平面;溶剂苯规则地排在方酸四碳的周围, 后者酷似电子陷肼。染料5有良好的水溶性。

Synthesis and crystal structure of 1, 3- bis- ( 3, 3- dimethyl- 2 -methylene indoleine) squarylium cyanine dyes

Sensitizers) 2,3,3-Trimethylindolenine (I) was treated with squaric acid (II) in the presence of H2SO4 to give 1,3-bis(3,3-dimethyl-2-methyleneindolenine)squarylium cyanine dye (III). Treatment of I with 1,3-propane sultone followed by reaction with II gave 1,3-bisN-(3-sulfonylpropyl)-3,3-dimethyl-2-methyleneindolenine]squaryli um cyanine dye. The crystal structure of III was determine by x-ray diffraction method.