ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Benzothiazole compounds. XX. Synthesis of 3,4,6-substituted benzothiazolium salts as plant growth regulators and their antimicrobial activity

J. Halgaš, V. Sutoris, P. Foltínová, and V. Sekerka

Department of Organic Chemistry, Faculty of Natural Sciences, Komenský University, CS-842 15 Bratislava

Abstract: Substituted benzothiazolium salts have been prepared by treatment of 4-CR₃-, 4-Cl-, 6-CH₃-, and 6-Cl-benzothiazoles with reactive halogen derivatives or dimethyl sulfate. Their stimulation and inhibitory effects on plant growth and antimicrobial activity including the Free—Wilson analysis are described. The highest stimulation activity was found with 6-methyl-3-propoxycarbonylmethylbenzothiazolium bromide, the highest inhibitory activity with 4-chloro-3-methylbenzothiazolium bromide and 4-chloro-3-methylbenzothiazolium methyl sulfate. The synthesized compounds have not exhibited noticeable antimicrobial activity.

Full paper in Portable Document Format: 376a799.pdf

Chemical Papers 37 (6) 799–808 (1983)