16317-69-4Relevant articles and documents
Synthesis and purification method for minoxidil
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Paragraph 0017; 0018; 0024; 0025, (2017/09/18)
The invention discloses a synthesis and purification method for minoxidil, belonging to the field of chemical synthesis. The method comprises the following steps: with 2,4-diamino-6-chloropyridine as a raw material, carrying out a two-step reaction of low-temperature oxidation and condensation under the condition of alkali catalysis so as to obtain a crude minoxidil product, and carrying out purification through processes like polar solvent crystallization and active carbon decolorization so as to obtain a purified minoxidilum product. The purified minoxidilum product has a purity up to 99.7%; and the preparation method has simple and convenient operation and is applicable to industrial production.