Acetic Acid → HCID 178431765, 화합물

참여 물질

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A single-necked flask containing 80 ml of ethanol is cooled down to 0° C. by an ice bath, 4 g (55.6 mmoles) of sodium ethylate and 3.8 g (27.8 mmoles) of tert-butylcarbamidine hydrochloride are added. The reaction mixture is left to return to ambient temperature, then 5 ml (27.8 mmoles) of diethyl ester methylmalonate is added dropwise. Stirring is maintained at ambient temperature overnight. The ethanol is then condensed under reduced pressure (2 kPa). The crude product obtained is solubilized in a minimum amount of water (approximately 40 ml), then acidified at 0° C. with pure acetic acid until a pH comprised between 4 and 5 is achieved. The white precipitate formed is filtered, rinsed successively with water, ethyl ether and with pentane. Then the white powder obtained is dried over P2O5 under reduced pressure (0.2 kPa). 2.4 g of expected product is obtained.

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