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- W4297387614 abstract "Abstract A convenient method for the preparation of halo-bicyclic molecules likely to show biological activity, from keten addition reaction with dimethyl cyclohexa-1,4-diene-1,2-dicarboxylate ( 3 ) and dichloroketene, respectively, under ultrasound irradiation, is reported. First, 1,4-diene 3 had been synthesized with Diels-Alder addition, and then the ketene addition reaction was carried out. Ultrasonic and non-ultrasonic conditions in the ketene addition reaction were investigated. Then, lactones ( 8 and 9 ) were obtained from ketene adducts. The structures of the molecules were illuminated by IR, and NMR spectroscopy techniques, especially Cosy spectroscopy. The test compounds improved antioxidant ability from 9.48% to 69.29% at concentration rates of 12.5-200 mg/L. The newly synthesized dichloro lactone 8 showed good antibacterial activity against gram-negative and –positive bacteria and also, antifungal activity. The antibiofilm activity of dichloro lactone 8 investigated and it showed 99.92 and 99.14% biofilm inhibiton activity againts Staphylococcus aureus and Pseudomonas aeruginosa , respectively at concentration of 250 mg/L. Moreover, it was displayed 100% Escherichia coli viability inhibition at concentrations of 125 and 250 mg/L." @default.
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- W4297387614 date "2022-09-27" @default.
- W4297387614 modified "2023-10-16" @default.
- W4297387614 title "Sonochemistry in organic synthesis: A convenient method for the preparation of halo-bicyclic molecules with keten addition reaction and biological properties of Dimethyl 7,7-dichloro-8-oxabicyclo[4.2.0]oct-3-ene-3,4- dicarboxylate" @default.
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- W4297387614 doi "https://doi.org/10.21203/rs.3.rs-2095109/v1" @default.
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