Nine novel lexitropsins were synthesized by linking two netropsin-like moieties through three different dicarboxylic acids; 9,10-dihydro-2,7-phenanthrenedicarboxylic acid; [(3-[(carboxymethyl)amino]carbonyl}benzoyl)amino]acetic acid and indole-2,5-dicarboxylic acid. The netropsin residues were modified by the use of N-isopentylpyrrole, 5-methylthiophene or 5-isopropylthiazole heterocyclic building blocks in place of the usual N-methylpyrrole. The compounds were tested against five gram-positive bacteria: Staphylococcus aureus, Streptomyces faecalis, methicillin resistant Staphylococcus aureus, Enterobacter cloacae, Mycobacterium fortuitum, three gram-negative bacteria: Klebsiella aerogenes, Proteus vulgaris, Escherichia coli and three fungi: Aspergillus niger, Candida albicans and Aspergillus nidulans. Some of the compounds showed significant inhibitory effects on the growth of the microorganisms.
合成了九种新型lexitropsin,通过三种不同的二
羧酸(9,10-二氢-2,7-
菲二
羧酸;[(3-[(羧甲基)
氨基]羰基}苯甲酰)
氨基]
乙酸和
吲哚-2,5-二
羧酸)将两个类似netropsin的部分连接在一起。通过使用N-异戊基
吡咯、5-甲基
噻吩或
5-异丙基噻唑异构体构建单元替代通常的
N-甲基吡咯,对netropsin残基进行修饰。将这些化合物分别针对五种革兰阳性菌:
金黄色葡萄球菌、肠球菌、耐
甲氧西林金黄色葡萄球菌、克雷伯氏菌和偶然分枝杆菌,三种革兰阴性菌:气单胞菌、变形杆菌、大肠杆菌,以及三种真菌:黑曲霉、白念珠菌和安氏曲霉进行了测试。其中一些化合物对微
生物的生长表现出显著的抑制作用。