Facile Synthesis of Novel Selenium‐Containing Benzopyrans |
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| Authors: | Zsolt Zsótér Tibor Tímár Krisztina Kónya Tamás Patonay József Jek? |
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| Institution: | 1. Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary;2. Ubichem Research Ltd., Budapest, Hungary;3. Department of Quality Control, SunPharma Ltd., Tiszavasvári, Hungary |
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| Abstract: | 4,4‐Dimethylchromeno4,3‐d]selenadiazoles 8 with insecticide activities have been synthesized via oxidative ring closure of the corresponding semicarbazone derivatives 7 by treatment with selenium dioxide. Reaction of various alkoxy‐2,2‐dimethyl‐2H‐benzopyrans with phenylselenyl chloride was utilized to prepare different phenylselenyl‐ and 3‐chloro precocene analogs. |
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