Hydrochloric Acid → 3,4-Dimethoxycinnamohydroxamic acid

関与物質

反応条件

反応手順

A solution of hydroxylamine hydrochloride (5.09 g, 72 mmol) in methanol (26 ml) was added to a solution of 88% potassium hydroxide (6.99 g, 109 mmol) in methanol (15.3 ml), keeping the temperature below 40° C. The mixture was cooled to 0° C., filtered, and methyl 3,4-dimethoxycinnamate (8.0 g, 36 mmol) was added to the filtrate. After two hours, concentrated HCl (5 ml) was added to the cold solution. The resulting precipitate was filtered, washed with water and ether, and dried in vacuo, to give 6.74 g (84% yield) of the named compound, mp 183°-185° C.

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