Ultrasonic assisted synthesis of imidazo[1,2-a]azine catalyzed by ZnO nanorods

Abstract

ZnO nanorods have been successfully used as an efficient, economic, and reusable catalyst for the synthesis of imidazo[1,2-a]azine under ultrasonic irradiation. This procedure offers advantages in terms of higher yields, short reaction times and mild reaction conditions.

Structural and optical characterization of ZnO and AZO thin films: the influence of post-annealing

“…Therefore, it has been used for myriad applications in solar cell, both thin films [4] and dye-synthesized solar cell (DSSC) [2], light emitting diodes (LED) [5], transparent conductive oxide (TCO) [6], gas sensors [7], and as a mid-layer in thin film solar cells [8]. Amongst different metal oxides, probably zinc oxide has the most different nano-shapes comprise nanowire [9], nanorod [10], hollow nanospheres [11], colloidal nanoparticles [12], and nanotube [13] which they are still under intensive researches. A host of different groups have developed this metal oxide semiconductor (MOS) thin film by variety of methods such as DC magnetron sputtering [14], RF sputtering [15], metal organic chemical vapor deposition (MOCVD) [16], thermal-evaporation [17].…”

Green bio‐based synthesis of Fe2O3@SiO2‐IL/Ag hollow spheres and their catalytic utility for ultrasonic‐assisted synthesis of propargylamines and benzo[b]furans

“…The high efficiency of ultrasonic irradiation was attributed to the cavitation phenomenon . This phenomenon includes generation, growth and collapse of cavities.…”

“…The high efficiency of ultrasonic irradiation was attributed to the cavitation phenomenon. [31,43] This phenomenon includes generation, growth and collapse of cavities. This can cause high local temperatures and pressures and focus vert large amounts of energy from the conversion of kinetic energy of liquid motion into heating of the contents of the cavities.…”

Sonochemical synthesis of library benzodiazepines using highly efficient molecular ionic liquid supported on Fe‐MCM‐41 nanocomposites as a recyclable catalyst

“…The ultrasound‐synthesized has been increasingly applied as an efficient tool in promoting chemical transformations and for the rapid generation of combinatorial chemicals . The reactions carried out under ultrasonic procedure have been attained with short reaction times, higher yields, cleaner conversion, improved selectivity, and mild reaction conditions as compared to the conventional methods . It should be noted that although a number of methods have been reported for the synthesis of benzodiazepines most of the procedures involve thermal condensation that require high temperature, long reaction times, and purification steps and tedious workups such as column chromatography.…”