中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-氯-2,4-二氟苯甲酸 | 2,4-difluoro-3-chlorobenzoic acid | 154257-75-7 | C7H3ClF2O2 | 192.549 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (3-Chloro-2,4-difluoro-5-nitrophenyl)methanol | 1000162-95-7 | C7H4ClF2NO3 | 223.563 |
—— | 5-nitro-3-chloro-2,4-difluorobenzoyl chloride | 1100985-19-0 | C7HCl2F2NO3 | 255.993 |
—— | 4-amino-3-chloro-2-fluoro-5-nitro-benzoic acid | 606144-32-5 | C7H4ClFN2O4 | 234.571 |
—— | 3-chloro-2-fluoro-4-methylamino-5-nitro-benzoic acid | 927430-56-6 | C8H6ClFN2O4 | 248.598 |
2,4-Difluoro-3,5-dichlorobenzoic acid, as a key intermediate for preparing quinolone-3-carboxylic acids, was synthesised from the commercially available 2,4-difluoro-3-chlorobenzoic acid in excellent yield by a reaction sequence involving nitration, selective reduction, diazotisation and chlorination.