Ethanol → HCID 20040624, compound

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Reaction Steps

5.0 Parts of 2,5-bis-(5-carboxy-2-methylpent-2-yl)-hydroquinone, 100 parts of absolute ethanol, and 1.0 parts of 98% sulphuric acid are refluxed for 16 hours. The solution is then stripped down under reduced pressure, the residue taken up in ether, and washed with sodium bicarbonate solution. The ethereal solution after being concentrated and diluted with 40°-60° petroleum ether yields 2,5-bis-(5-ethoxycarbonyl-2-methylpent-2-yl)-hydroquinone, [formula (103)] m.p. 146°-149° C. with the following percentage composition by weight:

Provenance & Evidence