Author(s)

Modather F. Hussein¹, Mostafa A. Ismail², Refaat A. El-Adly^3*

¹Faculty of Science, Al-Azhar University, Assiut, Egypt.
²Faculty of Education, Ain Shams University, Cairo, Egypt.
³Egyptian Petroleum Research Institute, Cairo, Egypt.

3-(5-(2.4-dichlorophyenyl)-4.5-dihydro-1H-pyrazol-3-yl)-4hydroxy-1-methylquinolin(1H)-one, 5-((4-hydroxy-8-methyl-2-oxo-1.2-dihydroquinolin-3-yl)methylene)-1-phenyl-2-hioxodihydropyrimidine-4.6(1H.5H)-dione, and 1-butyl-4-hydroxy-3-(5-styryl-4.5-dihydro-1H-pyrazol-3yl)quinolin-2(1H)-one were synthesized and characterized by spectroscopy analysis. These compounds are designated I, II and III, respectively. The antioxidants efficiency of the synthesized compounds in lubricating greases had been investigated using ASTM d-942 and ASTM d-664. The obtained data showed that the total acid number and oxygen pressure drop of these compounds in lubricating greases decrease in the order: Comp.III. < Comp.I. < Comp.II. The antioxidant efficiency of the prepared quinolinones derivatives was discussed. Acceptable correlations were obtained between the obtained oxidation inhibition and the calculated quantum chemical parameters.

Lubricating Greases, Antioxidants, 4-Hydroxy Quinolinone, Quantum Chemical Calculation

Hussein, M. , Ismail, M. and El-Adly, R. (2016) Synthesis and Evaluation of 4-Hydroxy Quinolinone Derivatives as Antioxidants of Lubricating Grease. International Journal of Organic Chemistry, 6, 207-219. doi: 10.4236/ijoc.2016.64021.