Synthesis and antimicrobial activity of new 3-(1-R-3(5)-methyl-4-nitroso-1H-5(3)-pyrazolyl)-5-methylisoxazoles
作者:Enrico Aiello、Stefania Aiello、Francesco Mingoia、Alessia Bacchi、Giancarlo Pelizzi、Chiara Musiu、Maria Giovanna Setzu、Alessandra Pani、Paolo La Colla、Maria Elena Marongiu
DOI:10.1016/s0968-0896(00)00211-x
日期:2000.12
A number of new 3-(1-R-3(5)-methyl-4-nitroso-1H-5(3)-pyrazolyl)-5-methylisoxazoles 6a-g (7b-f) were synthesized and tested for antibacterial and antifungal activity. Some of these compounds displayed antifungal activity at non-cytotoxic concentrations. Derivative 6c was 9 times more potent in vitro than miconazole and 20 times more selective against C. neoformans. 6c was also 8- and 125-fold more potent
合成了许多新的3-(1-R-3(5)-甲基-4-亚硝基-1H-5(3)-吡唑基)-5-甲基异恶唑6a-g(7b-f),并测试了其抗菌和抑菌活性。抗真菌活性。这些化合物中的一些在非细胞毒性浓度下显示出抗真菌活性。衍生物6c在体外的效价比咪康唑高9倍,对新孢梭菌的选择性高20倍。6c的效力分别比两性霉素B和氟康唑高8倍和125倍。没有一种化合物对细菌具有活性。初步的结构-活性关系(SAR)研究表明,吡唑环第4位的NO基对该活性至关重要。吡唑部分的亲脂性,N-烷基链长和两个杂环的平面性似乎在调节细胞毒性和抗真菌活性中起决定性作用。