%0 Journal Article %T Synthesis of pyranopyrazole and pyranopyrimidine derivatives using magnesium oxide nanoparticles and evaluation as corrosion inhibitors for lubricants %J Eurasian Chemical Communications %I Sami Publishing Company (SPC) %Z 2717-0535 %A Salih, Ahmad R. %A Al-Messri, Zainab A. K. %D 2021 %\ 08/01/2021 %V 3 %N 8 %P 533-541 %! Synthesis of pyranopyrazole and pyranopyrimidine derivatives using magnesium oxide nanoparticles and evaluation as corrosion inhibitors for lubricants %K Pyranopyrazole %K tetrahydrochromene %K pyranopyrimidine %K Lubricants %K copper corrosion inhibitor %R 10.22034/ecc.2021.291144.1189 %X A three-component, one pot reaction was used to synthesize different pyranopyrazole, tetrahydrochromene, and pyranopyrimidine derivatives using magnesium oxide nanoparticles with a faster reaction time, higher yield, and higher purity than a conventional piperidine base catalyst. The prepared compounds were identified by FT-IR, 1HNMR, 13CNMR spectroscopy, and evaluated as good copper corrosion inhibitors by blending with a base stock lubricant provided by the Iraqi Midland Refineries Company/Al-Daura according to ASTM–D130. %U https://www.echemcom.com/article_133937_15aba8fde8b0f58c530255f655c4566d.pdf