INDI MUMTAZA, 051411131190 (2018) PENGARUH KATALIS PIRIDIN DAN TRIETILAMIN (TEA) PADA SINTESIS ASAM 4-BENZOILOKSI-3-METOKSISINAMAT MELALUI METODE IRADIASI GELOMBANG MIKRO. Skripsi thesis, Universitas Airlangga.

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Abstract

This research aims to observe the effect of pyridine and triethylamine catalysts on the synthesis of 4-benzoyloxy-3- methoxycinnamic acid. It was formed from ferulic acid and benzoyl chloride through acyl substitution nucleophilic reaction by microwave irradiation. This reaction was conducted under 540 W microwave irradiation for 3 minutes (30 second x 6) for both catalysts. The result showed that triethylamine catalyst significantly provided higher yield percentage (71.8%), compared to pyridine (65.3%). This is considerably due to the inductive effect of ethyl on TEA and resonance effect of pyridine which related to its basicity. FT-IR spectrophotometry and 1H-NMR spectrometry profile confirmed that the product for both condition was 4- benzoyloxy-3-methoxycinnamic acid. The purity of the product for both reaction condition was then determined by melting point test, thin layer chromatography (TLC), showed that the product was pure.

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