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QSAR Study Concerning Photosynthesis Inhibition in Algae and Plant Chloroplasts by 2-Alkylthio-6-Rbenzothiazoles L 2-Alkylthio-6-aminobenzothiazoles, 3-(2-Alkylthio-6-benzothiazolylaminomethyl)-2-benzothiazolinethiones, 3-(2-Alkylthio-6-benzothiazolylaminomethyl)-6-bromo-2-benzothiazolinones

K. Kráľová, D. Loos, F. Šeršeň, and E. Sidóová

Institute of Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava

 

Abstract: Activity of 2-alkylthio-6-aminobenzothiazoles and their 6-N-substituted derivatives (3-(2-alkylthio-6-benzothiazolylaminomethyl)-2-benzothiazolinethiones and 3-(2-alkylthio-6-benzothiazolylaminomethyl)-6-bromo-2-benzothiazolinones) concerning photosynthesis inhibition in algae Chlorella vulgaris and in spinach chloroplasts has been correlated with lipophilicity and dipole moments of the effecters using the Hansch method. Parameters of the Hansch equation were calculated by theoretical methods. The benzene and the thiazole rings of 2-alkylthio-6-R-benzothiazoles are the electron-donor part of the investigated benzothiazole effecters. Antialgal activity of the compounds of the series containing bromine showed relatively high efficiency for all investigated derivatives with negligible differences.

Full paper in Portable Document Format: 483a198.pdf

 

Chemical Papers 48 (3) 198–202 (1994)

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