The three isomeric ring monochlorinated derivatives of 3-amino-5-hydroxybenzoic
acid (1), required for studies of the biosynthesis and synthesis of several
important classes of antibiotics, are prepared from methyl
3-amino-5-hydroxybenzoate (5). N-Chlorosuccinimide selectively monochlorinates the 2- and 6-positions of this substrate,
whilst perchlorination followed by hydrolysis and regiospecific protodechlorination
at the 2- and 6-positions affords the 4-chloro acid.
3-amino-5-hydroxybenzoic acid(5-羟基苯甲酸)的三种异构环单氯化物衍生物(1
研究生物合成和几类重要抗生素合成所需的 3-amino-5-hydroxybenzoic acid (1)
3-amino-5-hydroxybenzoic acid (1) 是研究生物合成和合成几类重要抗生素所需的单氯环衍生物。
3-amino-5-hydroxybenzoate (5)制备而成。N-Clorosuccinimide 可选择性地对这种底物的 2-位和 6-位进行单氯化、
而在 2-位和 6-位上先进行过氯化反应,然后再进行水解和区域特异性原去氯化反应
在 2-位和 6-位进行高氯反应,然后进行水解和区域特异性原去氯反应,得到 4-氯酸。