Acceleration of alkenyltrimethylsilane fluorination under mild conditions using ultrasound.
Alkenyltrimethylsilanes are selectively fluorodesilated to alkenyl fluoride very readily by reaction with 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2,2,2]octane bis-tetrafluoroborate (Selectfluor) and N-fluorobenzensulfonimids at room temperature under ultrasound. In the presence of ultrasound irradiation in the case of one of the reactions, the yield was 85% after 25 min, but using the previously established thermal method the yield was only 32% after 20 h.
Ranjbar-Karimi
Reza
R
Department of Chemistry, Faculty of Science, Vali-e-Asr University, Rafsanjan 77176, Islamic Republic of Iran. karimi_r110@yahoo.com
D000475:Alkenes / Q000737:chemistry* / Q000528:radiation effects*; D005459:Fluorides / Q000737:chemistry* / Q000528:radiation effects*; D012821:Silanes / Q000737:chemistry* / Q000528:radiation effects*; D013010:Sonication
D000475:Alkenes; D012821:Silanes; D005459:Fluorides