3,3’-二乙基-4,4’-二氨基二苯甲烷的合成研究

3,3’-二乙基-4,4’-二氨基二苯甲烷是合成树脂固化剂类物质的关键中间体,其合成文献报道较少。本文以邻乙基苯胺和甲醛为起始原料,考察不同种类的酸催化剂、溶剂、物料配比对反应的影响,以得出合成3,3’-二乙基-4,4’-二氨基二苯甲烷的优化工艺条件。在最佳工艺条件下,目标产物的纯度达到93%以上,产品收率大于91%。该工艺不论是成本还是产品质量,都得到了显著改善,最佳工艺条件可直接应用于工业化生产。

Novel Fluorescent Dyes Based on Coumarin System

Seven novel fluorescent coumarin derivatives were synthesized from 7-diethylamino-4-chloro-3-formyl-coumarin. The spectra of absorption, excitation and emission were dependent not only on the structures and also on the concentration of dyes. The PPP-MO predictions can only be consistent with the spectra in dilute solutions.