10169-50-3Relevant articles and documents
Rearrangements during nitrosodecarboxylation of isomeric dibromohydroxybenzoic acids
Shishkin,Fadin
, p. 688 - 692 (2008)
The reaction of 3,5-dibromo-4-hydroxybenzoic acid, its sodium salt, and also sodium 3,5-dibromo-2-hydroxybenzoate with NaNO2 in a glacial acetic acid at room temperature led to the formation of a mixture of dibromonitrophenol resulting from nitrosodecarboxylation accompanied by a rearrangement processes and followed by oxidation of the arising nitrosophenols.
3-process for the preparation of amino-salicylic acid
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Paragraph 0029-0031, (2016/10/08)
The invention relates to a novel preparation method of 3-aminosalicylic acid. The novel preparation method is characterized in that a salicylic acid compound I as an initial raw material having a general formula shown in the description and a nitration agent undergo a reaction to produce a 3-nitrosalicylic acid compound II having a general formula shown in the description, and the 3-nitrosalicylic acid compound II undergoes nitryl catalytic hydrogenation reduction and dehalogenation hydrogenolysis reactions in the presence of an effective dose of a catalyst and hydrogen donors so that 3-aminosalicylic acid is produced.