Potassium benzohydroxamate

Potassium benzohydroxamate, 19, 16 Potassium bichiomate, 12, 64 Potassium cyanide, 16, 35 Potassium ethylate, 18, 26 Potassium ferricyanide, 15,41 Potasrium h rpobromite, 16, i Potassium hypochlorite, 17, 66 Potassium iodide, 19, 55, 81 Potassium permanganate, see Oxidation Potassium phthalimide, 17, 4 Potassium selenide, 18, 27 Prehnitene, 10,37 11, loi Profidnaldeeyde, 12, 64 13, 108 18,... 

While maintaining the reaction temperature at 0-5°C, 15 gm (0.1 mole) of ethyl benzoate is added. Vigorous stirring is continued at room temperature for 6 hr. Then the solids are filtered off. The solids are washed with cold water to remove inorganic coproducts. The remainder, recrystallized from aqueous ethanol, represents a 94% yield of potassium benzohydroxamate. 

Derivatives. For the preparation of benzohydroxamic acid, isolated as the potassium salt, separate solutions of 46.7 g. (0.67 mole) of hydroxylamlne hydrochloride in 240 ml. of methanol and of 1 mole of potassium hydroxide in 140 ml. of methanol are prepared at the boiling points, cooled to 30-40°, and the second solution is added to the first. After cooling in ice to ensure complete separation of potassium chloride, 0.33 mole of ethyl benzoate is added with shaking. The mixture is filtered quickly... 

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