Polyphenol amine compound as well as a preparation method and application thereof in cysteine detection

The invention discloses a polyphenol amine compound as well as a preparation method and application thereof in cysteine detection. The chemical structural formula of the polyphenol amine compound is shown in the specification, wherein R1 is hydrogen or alkyl, R2 is defined as in the specification, R3 is defined as in the specification, R4 is hydrogen or alkyl, R5 is hydrogen or alkyl, R6 is hydrogen or alkyl, and R7 is hydrogen or alkyl. According to the polyphenol amine compound provided by the invention, in the qualitative detection process of cysteine, the variety range of amino acid can be narrowed, then qualitative analysis of cysteine is realized through pH detection, and the detection efficiency is improved. 本发明公开了多酚胺类化合物及其制备方法与其在检测半胱氨酸的应用，其化学结构式为其中，R1为氢或烷基，R2为或R3为或R4为氢或烷基，R5为氢或烷基，R6为氢或烷基，R7为氢或烷基。本发明提供的多酚胺类化合物在定性检测半光氨酸的过程，能够缩小位置氨基酸的种类范围，然后通过pH检测实现对半胱氨酸的定性分析，提高了检测效率。