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Synthesis and Evaluation of Some New Thiazoles as Antioxidant Additives for Egyptian Lubricating Oils

Author(s): F. A. Amer | H. M. Hassan | E. B. Moawad | Noha Shaker

Journal: Advances in Petroleum Exploration and Development
ISSN 1925-542X

Volume: 1;
Issue: 1;
Start page: 40;
Date: 2011;
Original page

Keywords: Key words: Aminothiazole | Condensation | Antioxidant Additives

4-(2-Aminothiazol-4-yl)-phenol (1) reacted with 2-(4-methoxy-benzylidene)-malononitrile or 1,3-diphenyl-1H- pyrazole-4-carbaldehyde to afford enaminonitrile, pyrazolo derivatives 2 and 3, respectively. On the other hand, methylation of 1 afforded the acetyl derivative 4 which reacted with phenyl isothiocyanate, diazonium salt, acetic anhydride, cyclic anhydride, ethyl acetoacetate, benzaldehyde or phosphorous oxychloride to afford compounds 5-9, 11 and 12, respectively. Moreover, the compound 12 reacted with ethyl cyanoacetate to afford compound 13. A one-pot reaction of compound 1 with ethyl acetoacetate and benzaldehyde afforded compound 10. The synthesized compounds were evaluated as antioxidant additives for lube oil. Key words: Key words: Aminothiazole; Condensation; Antioxidant Additives
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