No abstract

This work, which can be considered as a complement to our previous studies concerning chemical energy storage systems developing programmed, proposes the synthesis of new azo-Schiff bases derived from 1, 5-diaminoanthraquinone (DAAQ) resulting in an improvement in their absorption spectra. Five new derivatives (An1-An5) were synthesized by gentle fusing of (1 mmol of DAAQ) with (2 mmol) of early prepared azo derivatives of 2hydroxy benzaldyhde. Medium to good yield was recorded on applying this method.Microwave irradiation of the same mixtures led to decomposition of the starting azo materials whereas prolonged reflux in DMSO was unproductive.

In this research we prepared about 28 derivatives of five-membered heterocyclic compounds (1,3,4-oxadizoles) in two lines , in the first line we used phenylhydrazide and in the second line we used 4-hydroxy phenylhydrazide as starting material for cyclization, By using eco-friendly efficient synthesis of oxadiazole derivatives through the reaction of aromatic hydrazide with different substituted aromatic aldehydes by grinding them in the presence of catalytical amounts of iodine.