1308490-11-0Relevant articles and documents
Pyrocatechol derivative and preparation method thereof
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Paragraph 0111; 0112, (2018/07/07)
The invention discloses a pyrocatechol derivative and a preparation method of the derivative. The preparation method of the derivative comprises the following steps of: (1) taking an aryl phenol compound as a substrate, and 2-chlorine-5-nitryl pyrimidine as an orienting group, slowly adding a redistilled tetrahydrofuran solvent ice bath into sodium hydride in the presence of nitrogen for reactionto form a pyrimidine aryl phenol compound intermediate, (2) taking iodobenzene diacetate as an oxidant and palladium acetate as a catalyst, catalyzing the pyrimidine aryl phenol compound intermediatefor C-H activating reaction in a solvent, performing swab-off, and chromatographic separation and purification to form an acetoxylated phenylamine derivative, and (3) allowing the acetoxylated phenylamine derivative to react in a tetrahydrofuran solvent by using hydrazine hydrate, and performing quenching, washing, extraction, drying, swab-off, and chromatographic separation and purification to form an ortho-aminophenol derivative. The first two steps of the method can be achieved in a pot, and small-scale production of above a 'gram' level can be even achieved.