UV–Vis spectroscopy techniques The obtained catalyst has been utilized for the one-pot, four-component synthesis of spiro[indoline-3,2′-quinoline] derivatives from the combination of isatins, amines, dimedone, and dialkylacetylenedicarboxylates. The advantages of this protocol included the use of common and easily-available starting materials, utilizing ambient temperature, non-toxic and inexpensive reagent
以二苯并
18-冠-6([DB-18-C-6K+][OH-] nIL)为基础,通过简单的方法合成了一种新型纳米级
冠醚基
离子液体,并通过傅立叶变换表征红外光谱、核磁共振光谱、高分辨率扫描电子显微镜、能量色散 X 射线光谱、热重/差热分析和紫外-可见光谱技术所获得的催化剂已用于一锅四组分从
靛红、胺、
二甲酮和二烷基
乙炔二
羧酸盐的组合合成螺[indoline-3,2'-quinoline]衍
生物。该协议的优点包括使用常见且易于获得的起始材料、利用环境温度、无毒且廉价的试剂使用、产品产量高、