Cytotoxic activity of 7-R-4-substituted quinoline

Abstract

Annotation. Quinoline derivatives are important compounds for chemical synthesis and the development of new drugs and pesticides. The practical application of a number of substances with a quinoline heterocycle in medical practice and agriculture is well known. Quinoline compounds exhibit a wide range of biological effects, including cytotoxic activity. Phytotoxic (cytotoxic) activity of 15 4-substituted quinoline derivatives were studied and compared with reference drugs. 7-R-4-substituted quinoline derivatives were tested by root test on Cucumis sativus L. seedlings at different concentrations. Distilled water was used as reference in the control experiment. During the experiment, all factors were taken into account to create equal conditions for all studied elements. The obtained results were processed using the program “STATISTICA® for Windows 6.0” (StatSoft Inc, No. АХХР712D833214FAN5) by methods of variational statistics using the Student’s t-test. 7-R-4-substituted quinoline derivatives turned out to be predominantly cytotoxic compounds, that corresponds to the “structure-action” dependence between the structure of investigated compounds and their biological activity. All tested compounds have a pronounced phytotoxic effect at the concentration of 500 μg/ml. The most pronounced cytotoxic effect was recorded among the (heteryl)cysteamine derivatives – β-(quinolin-4-yl)cysteamine dihydrochloride, β-(7-chloroquinolin-4-yl)cysteamine dihydrochloride, 3-((7-chloroquinolin-4-yl)thio)propanoic acid hydrochloride. Derivatives of (heterylthio)acetic acids have shown growth-promoting effects at low concentrations. Thus, 2-(quinolin-4-ylthio)- and 2-(7-chloroquinolin-4-ylthio) acetic acids have shown the most active effect (50-250% compared to control group) at concentrations of 1-20 μg ml. Sodium 3-((7-chloroquinolin-4-yl)thio)propanoate has indicators that exceed the control by 7-60%, with the most effective growth of the main root of seedlings by 30% among all studied substances at the concentration of 100 μg/ml compared to control group. Some compounds have cytotoxic activity that can be used in crop production as growth regulators of agricultural plants.