- Method for preparing hydroxamic acid compound from peroxide
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The invention relates to the technical field of organic chemistry, in particular to a method for preparing a hydroxamic acid compound from peroxide. The preparation method comprises the following steps: S1, dissolving peroxide and reducing salt in a solvent, and reacting to obtain a first mixture, and S2, adding a hydroxylamine compound and alkali into the first mixture, reacting to obtain a second mixture, and separating and purifying to obtain a hydroxamic acid compound. The preparation method is wide in raw material source, low in cost, simple and convenient to operate, high in product yield, free of wastewater discharge and easy to realize industrial production.
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Paragraph 0042; 0043; 0048-0051
(2021/01/24)
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- Carboxylic ester oximationmethod
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The invention discloses method for preparing(iso)hydroxamic acid salt or (iso)hydroxamic acid. The method for preparing (iso)hydroxamic acid salt or (iso)hydroxamic acidcomprises the steps that analkali, a hydroxylamine salt, and an organic carboxylic acid ester are directly subjected to hybrid reaction without an extra solvent, and thusan (iso) hydroxamic acid salt product is obtained; and or after the reaction is completed, a reaction system is cooled, an acid is added to the reaction system to obtain (iso)hydroxamic acid.According to themethod for preparing (iso)hydroxamic acid salt or (iso)hydroxamic acid,the (iso)hydroxamic acid salt or the (iso)hydroxamic acidcan be obtainedwith near atomic economy without additional organic solvents or water being added, environment-friendly effectis achieved, simpleness and efficiency are achieved, and industrial production is advantageous.
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Paragraph 0055-0057; 0060-0062; 0084-0086
(2019/11/04)
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