68391-43-5Relevant articles and documents
Preparation method of azo compounds
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Paragraph 0032-0035; 0036-0038; 0039; 0040, (2017/11/18)
The invention discloses a preparation method of azo compounds. The preparation method of the azo compounds comprises the following steps: (1) in a sulfuric acid aqueous solution with the mass concentration being 60 to 80 percent by weight, performing diazo-reaction on a compound 4 and nitrosyl sulfuric acid to prepare a mixture containing diazo salt as shown in a formula 2, and performing coupling reaction on the mixture and a compound 3 to obtain a compound 1. The method is mild in reaction condition and environmentally-friendly. (The formula is as shown in the description).