中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-(乙酰基氨基)-5-氯苯甲酸 | 2-acetamido-5-chlorobenzoic acid | 5202-87-9 | C9H8ClNO3 | 213.62 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-氨基-5-氯-3-硝基苯甲酸 | 2-amino-5-chloro-3-nitrobenzoic acid | 6324-51-2 | C7H5ClN2O4 | 216.581 |
The condensation of 2,3-diaminobenzoic acid and the 5-chloro derivative with o-hydroxyphenylglyoxylic acid, isatin and benzothiophen-2,3-dione in polyphosphoric acid leads to the appropriate tetracycles. Isomeric products are formed from these unsymmetrical diamines, and methods of assigning particular structures are described.