Synthesis and Pharmacological Activities of 1,8-Naphthyridine Derivatives.
作者:Joseph Thomas Leonard、Revuluri Gangadhar、Sundararaj Kishore Gnanasam、Somasundaram Ramachandran、Muniyandy Saravanan、Seshaiah Krishnan Sridhar
DOI:10.1248/bpb.25.798
日期:——
In the present study, a series of 2-substituted-4-methyl-7-amino/4,7-dimethyl-1,8-naphthyridines were synthesized and characterized by IR, 1H-NMR and elemental analysis. The compounds were investigated for anticonvulsant (125, 250 mg/kg), cardiac and antimicrobial activities. The compounds were screened for antibacterial activity against gram (+) bacteria (Staphylococcus epidermidis, Bacillus subtilis, Enterococcus faecalis and Micrococcus luteus) and gram (−) bacteria (Proteus vulgaris, Pseudomonas aeruginosa, Escherichia coli and Salmonella typhi). All the compounds except 2-(3′-phenylaminopropyloxy)-4-methyl-7-amino-1,8-naphthyridine exhibited significant anticonvulsant activity. The anticonvulsant activity of 2-(3-morpholino-2′-hydroxypropyloxy)-4-methyl-7-amino-1,8-naphthyridine, 2-(3′-diphenylamino-2′-hydroxypropyloxy)-4-methyl-7-amino-1,8-naphthyridine and 2-(3′-diethanolamino-propyloxy)-4,7-dimethy-1,8-naphthyridine at the dose of 250 mg/kg were found to be equivalent to diazepam (5 mg/kg). Sympathetic blocking activity was observed with 2-(3′-phenylamino-2′-hydroxypropyloxy)-4-methyl-7-amino-1,8-naphthyridine, 2-(3′-diethanolamino-2′-hydroxypropyloxy)-4-methyl-7-amino-1,8-naphthyridine and 2-(3′-diphenylamino-2′-hydroxypropyloxy)-4-methyl-7-amino-1,8-naphthyridine only. All the compounds were devoid of antibacterial activity against the tested bacteria.
在本研究中,合成了一系列2-取代-4-甲基-7-氨基/4,7-二甲基-1,8-萘啶,并通过红外、1H-NMR和元素分析进行了表征。研究了这些化合物的抗惊厥(125、250 mg/kg)、心脏和抗菌活性。筛选了这些化合物对革兰氏(+)细菌(表皮葡萄球菌、枯草芽孢杆菌、粪肠球菌和藤黄微球菌)和革兰氏(-)细菌(普通变形杆菌、铜绿假单胞菌、大肠杆菌和伤寒沙门氏菌)的抗菌活性。除2-(3'-苯氨基丙氧基)-4-甲基-7-氨基-1,8-萘啶外,所有化合物均表现出显着的抗惊厥活性。 2-(3-吗啉代-2'-羟基丙氧基)-4-甲基-7-氨基-1,8-萘啶、2-(3'-二苯氨基-2'-羟基丙氧基)-4-甲基-7的抗惊厥活性-氨基-1,8-萘啶和2-(3′-二乙醇氨基-丙氧基)-4,7-二甲基-1,8-萘啶在250 mg/kg剂量下被发现相当于地西泮(5 mg/千克)。使用 2-(3'-苯氨基-2'-羟基丙氧基)-4-甲基-7-氨基-1,8-萘啶、2-(3'-二乙醇氨基-2'-羟基丙氧基)-4-观察到交感神经阻滞活性仅甲基-7-氨基-1,8-萘啶和2-(3'-二苯氨基-2'-羟基丙氧基)-4-甲基-7-氨基-1,8-萘啶。所有化合物对测试细菌均缺乏抗菌活性。