ABSTRACT

A novel mesoporous Al-SBA-15 modified by N,N'-(1,2-phenylene)bis(2-aminobenzamide) dichloro cobalt has been prepared and applied as a reusable catalyst in the 3-cinnamoyl coumarins synthesis via three-component reaction between benzaldehydes, salicylaldehydes and ethyl acetoacetate by the assist of ultrasonic irradiation. By using of the nanocatalyst and also ultrasound irradiation, the easiness and velocity of the abovementioned reaction were enhanced and an environment friendly condition was provided to synthesis of various 3-cinnamoyl coumarin compounds. The properties and structure of nanocatalyst have been specified by methods including powder X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), nitrogen adsorption–desorption analysis and scanning electronic microscopy (SEM). Superiority of this novel and viable method is due to mild reaction condition, short reaction times, high yields of 3-cinnamoyl coumarins, environmentally benign, recoverability of the CoCl₂N,N'-(1,2-phenylene)bis(2-aminobenzamide)/Al-SBA-15 catalyst and reusability with important preservation in its catalytic activity.

摘要

一种新型中孔铝-SBA-15 N，N'修饰的- （1,2-亚苯基）双（2-氨基苯甲酰胺）二氯钴已被制备并在3肉桂酰基香豆素合成可重复使用的催化剂施加经由超声辐射辅助下苯甲醛，水杨醛与乙酰乙酸乙酯的三组分反应。通过使用纳米催化剂以及超声辐射，提高了上述反应的容易性和速度，并且为合成各种3-肉桂酰基香豆素化合物提供了环境友好的条件。纳米催化剂的性质和结构已通过粉末X射线衍射（XRD），能量色散光谱（EDS），傅立叶变换红外光谱（FT-IR），透射电子显微镜（TEM），氮吸附-解吸分析等方法进行了说明。和扫描电子显微镜（SEM）。这种新颖可行的方法的优越性在于反应条件温和，反应时间短，3-肉桂酰基香豆素收率高，对环境无害，₂ N，N'-（1,2-亚苯基）双（2-氨基苯甲酰胺）/ Al-SBA-15催化剂的重用性和重要的催化活性保存。