Phase Transfer Catalyzed Dehydrogenation Synthesis of Azo Ureas From Aryl Substituted Semicarbazide

Abstract

Phase transfer catalyzed dehydrogenation synthesis azo Ureas Compounds have been studied. Ten of the compounds were Synthesized by the reaction of aryl Substituted Semicarbazied Compounds with phase transfer catalyst–“Galvinoxyl” radical between two phase under mild Conditions. The products are obtained in 90–99(%) yield. Their structure are identified by elemental analysis, IR, ¹HNMR, MS spectra. A possible mechanism is suggested by a “Galvinoxyl” radical act on aryl substituted semicarbazide formed azo compounds.

Synthesis of bis (Substituted phenyl) Carbodiazone Compounds (ArN = NCON = NAr') have been reported¹, As another part of our studies, 1, 4-di-Substituted azo Compounds (ArNHCON=NAr') Were Synthesized by the reaction of Substituted Semicarbazide Compounds With a phase transfer Catalyst-“Galvinoxyl” radical, which has been acted as a radical Scavenger², yet, “Galvinoxyl” radical used as phase transfer Catalyst have not been reported so far. Azo Compounds have been widely utilized as dyes and analytical reagents. They can also be used as material of non - linear optics, optic information storring material in Laser dish and dyes with oil solubility in photochromy in modern technology^3,4. Recently, many noteworthy Studies show that azobenzene derivative Possess Very good optic remembering and photoelectric properties⁵, optical Switching and Image storege by means of Azobenzene Liquid - Crystal Films⁶. The preparation of the azo compounds which have the Connection of -N = N- and hydrocarbyl group have been described in many Literatures^7,8.. In this paper, a new reaction of phase transfer Catalyzed dehydrogenation of aryl Substituted Semicarbazide