Synthesis, characterization, and biological evaluation of some N-aryl hydrazones and their 2,3-disubstituted-4-thiazolidinone derivatives
作者:Chidananda Nandagokula、Boja Poojary、Sumangala Vittal、Shalini Shenoy、Prashanth Shetty、Arulmoli Tangavelu
DOI:10.1007/s00044-012-0028-8
日期:2013.1
condensation of 2-bromo-5-methoxy benzohydrazide 4 with 2 or various substituted aromatic aldehydes. The new Naphthalene-2-carboxaldehyde 2 has been synthesized by Vilsmeier-Haack reaction of naphthalen-1(2H)-one 1. The key starting compound 2-bromo-5-methoxy benzohydrazide 4 was prepared from methyl 2-bromo-5-methoxybenzoate 3 by the reaction with hydrazine hydrate in alcoholic medium. The formulae
通过各种取代的N-芳基5和7a-p与巯基乙酸的环缩合反应,制备了一系列2,3-二取代的4-噻唑烷酮6和8a-p。中间的N-芳基5和7a-p是通过2-溴-5-甲氧基苯并肼4与2个或各种取代的芳族醛的缩合反应合成的。通过萘-1(2 H)-1的Vilsmeier-Haack反应合成了新的萘-2-甲醛2。。由2-溴-5-甲氧基苯甲酸甲酯3与水合肼在酒精介质中反应,由2-溴-5-甲氧基苯甲酸甲酯3制备关键起始化合物2-溴-5-甲氧基苯甲酰肼4。通过元素分析确认化合物的式,并基于IR,1 H-NMR,13 C-NMR,13 C-NMR-DEPT和质谱数据确定其结构。评价了新合成的化合物的抗氧化,抗炎和止痛活性。新合成的化合物对大肠杆菌ATCC 8739,金黄色葡萄球菌ATCC 6538,铜绿假单胞菌ATCC 1539和蜡状芽孢杆菌的抗菌活性,同时测试了该化合物对白色念珠菌的抗真菌活性。测试了化合物7h和8a的急性细胞毒性数据,发现最高至2