Synthesis of Methyl 3-(4-hydroxyphenyl) acrylate using Domestic Microwave Irradiation at 200 Watt Power
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In this study, a methylation reaction was carried out for the p-coumaric acid compound using potassium carbonate as a base and dimethyl carbonate as a methylation agent with acetone as a solvent. The methylation reaction was carried out using microwave irradiation from microwave domestic with a power of 200 watts. The purity test was carried out on a TLC plate using three different eluents and produced a single stain that was different from the initial compound. The phenol functional group tested with FeCl3 reagent showed a positive purple color. Compound identification using an FT-IR spectrophotometer and a 1H-NMR spectrometer. In the synthesized FT-IR spectrum, there is an absorption of the ester group at wave numbers 1671 cm-1 (C=O group) and 1243 cm-1 (C-O group), there is a band at 3378 cm-1 indicating the presence of the phenol group. There are differences in fingerprint results in the FT-IR spectrum of the p-coumaric acid compound and the results of the methylation reaction. The 1H-NMR spectrum confirmed the presence of three methyl ester protons of the carboxylic acid and the phenolic OH. This shows that the synthesis carried out has produced a compound, namely methyl (E)3-(4-hydroxyphenyl) acrylate).
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