Synthesis of some newer derivatives of 2-amino benzoic acid as potent anti-inflammatory and analgesic agents
作者:Ashok Kumar、Deepti Bansal、Kiran Bajaj、Shalabh Sharma、Archana、V.K. Srivastava
DOI:10.1016/s0968-0896(03)00529-7
日期:2003.11
Diazotization of N-benzylidene anthranilic acids 1a-1n at pH 9 yielded N-[alpha-(phenylazo) benzylidene] anthranilic acids 2a-2n and at pH 3 yielded N-benzylidene-5-(phenylazo) anthranilic acids 3a-3n. When compounds 3a-3n were treated with thioglycolic/thiolactic acid in the presence of anhydrous ZnCl(2), 2-(4-oxo-2-phenylthiazolidin-3-yl)-5-(phenylazo) benzoic acids 4a-4n were afforded. The newly synthesized
N-亚苄基邻氨基苯甲酸1a-1n在pH 9下的重氮化产生N- [α-(苯基偶氮亚苄基)]邻氨基苯甲酸2a-2n,而在pH 3下产生N-亚苄基-5-(苯基偶氮)邻氨基苯甲酸3a-3n。当化合物3a-3n在无水ZnCl(2)存在下用巯基乙酸/巯基乳酸处理时,得到2-(4-氧代-2-苯基噻唑烷-3-基)-5-(苯基偶氮)苯甲酸4a-4n 。筛选了新合成的化合物的抗炎和镇痛活性,并与标准药物阿司匹林和苯基丁a进行了比较。在所研究的化合物中,活性最高的化合物4n在所有测试剂量下均比标准药物具有更强的活性。