EventsThe 9th International Electronic Conference on Synthetic Organic Chemistry
Event submissions
Published
with-doi10.3390/ecsoc-9-01511
This submission belongs to the session c. Bioorganic Chemistry and Natural Products of the event The 9th International Electronic Conference on Synthetic Organic Chemistry
Published date
01 Nov, 2005
Citation
Renata Gasparova, Mario Klestinec, Pavol Kois, Maria Henselova, Margita Lacova, 2-(4H-4-Oxo-benzopyran-3-yl)benzothiazolium Salts. Synthesis, Reactions and Plant Growth Activity, in Proceedings of The 9th International Electronic Conference on Synthetic Organic Chemistry, 1 November–30 November 2005, MDPI: Basel, Switzerland, doi: 10.3390/ecsoc-9-01511
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2-(4H-4-Oxo-benzopyran-3-yl)benzothiazolium Salts. Synthesis, Reactions and Plant Growth Activity

Renata Gasparova 1
Mario Klestinec 2
Pavol Kois 2
Maria Henselova 3
Margita Lacova 2
1. Department of Chemistry, Faculty of Natural Sciences, University of St. Cyril and Methodius, Námestie Jozefa Herdu 2, Sk-917 01 Trnava, Slovakia
2. Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava, Slovakia
3. Department of Plant Physiology, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava, Slovakia
Abstract
One-pot and facile preparation of novel 2-(4H-4-oxo-benzopyran-3-yl)benzothiazolium salts 3 is described using the fast condensation of 3-formylchromones 1 with 3-benzyl-2-methylbenzothiazolium (or benzoxazolium) bromides 2. Reactions under microwave irradiation, in comparison with classical reactions, proceeded significantly faster and with high yields. Reaction of benzothiazolium salts with secondary and primary amines was also studied. Synthesized chromone derivatives stimulated significantly the growth of the radicle and the hypocotyl at concentrations of 0.1 and 1 ppm, respectively.
Keywords
chromones
benzoxazolium salts
microwave synthesis
aldol reactions
3-Formylchromones
plant growth activity
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