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• W2949258045 abstract "Abstract An ionic liquid phase organic synthesis (IoLiPOS) has been developed for the preparation of 2-thioxo tetrahydropyrimidin-4(1H)-ones. Treatment of the starting poly(ethyleneglycol)ionic liquid phases (PEGn-ILPs) 1 with acryloyl chloride 2 afforded a serie of (PEGn)-ILPs bound acrylate 3 in quantitative yields. Michael addition of aliphatic primary amines 5 to the PEG1-ILPs 3 ( a,d ) allowed the preparation of β-aminoesters 6 in high yields. Addition of alkyl isothiocyanates 7 to 6 gave the corresponding thioureido esters 8 in the third step. The final cyclization-cleavage under microwave/solventless strategy provides, under basic conditions, the expected 2-thioxo tetrahydropyrimidin-4(1H)-ones 9 in high purity after flash chromatography. According to the IoLiPOS methodology, the NMR method was used to establish loading of all the PEG-ionic liquid phases intermediates." @default.
• W2949258045 created "2019-06-27" @default.
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• W2949258045 date "2004-04-01" @default.
• W2949258045 modified "2023-10-01" @default.
• W2949258045 title "Ionic liquid phase organic synthesis (IoLiPOS) methodology applied to the three component preparation of 2-thioxo tetrahydropyrimidin-4-(1H)-ones under microwave dielectric heating" @default.
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• W2949258045 doi "https://doi.org/10.1016/j.tet.2004.03.026" @default.
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