The aim of this study is to compare three oil extraction methods and to evaluate their efficiency for producing an oil rich in polyphenols. The three extraction methods are screw pressing, extraction by supercritical CO 2 percolation and the combination of these two processes (Gas-Assisted Mechanical Expression: GAME). Screw pressing is the most efficient process for producing grape seed oil with a high yield, but supercritical CO 2 process permits an increase of polyphenol co-extraction with oil. The GAME process allows extraction of more polyphenols than screw pressing and constitutes an interesting process considering oil yield.
Abstract1,3-Dibenzyl-5-chloro-2-oxo-4-imidazoldinecarbaldehyde 3 was prepared in two steps from hydantoin using Vilsmeier-Haack reagent. Treatment of 3 with sodium sulfide nonahydrate and different activated halides or methyl thioglycolate afforded new substituted thieno [2,3-d]imidazolones.
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