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Ultrasonics in organoborane chemistry, rapid synthesis of triorganylboranes via a modified organometallic route

✍ Scribed by Herbert C. Brown; Uday S. Racherla

Publisher: Elsevier Science
Year: 1985
Tongue: French
Weight: 212 KB
Volume: 26
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)98721-5

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✦ Synopsis

A variety of triorganylboranes were prepared in a rapid and highly efficient manner, directly from organic halides, by a modified organometallic route employing ultrasound. Mg turnings (0.97 g, 40 mmol), a crystal of 12, BF3.0Et2 (1.42 g, 10 mmol), n-undecane (0.78 g, 5 mmol) and anhydrous ether (34.5 ml) were taken into the reaction flask under N2. The sonic disruptor (Model TSD-B-250, 250 watts, 20 KHz) was switched on (with timer switch on hold and output control at 5) and 1-bromopropane (4.31 g, 35 mmol) was next added dropwise over a period of 5 minutes. Decolorization of iodine was observed when approximately 0.5 ml of alkyl halide

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