45481-30-9Relevant articles and documents
Organoboranes. 49. An examination of convenient procedures for the generation of borane and monoalkyl- and dialkylboranes from lithium borohydride and monoalkyl- and dialkylborohydrides
Cole, Thomas E.,Bakshi, Raman K.,Srebnik, Morris,Singaram, Bakthan,Brown, Herbert C.
, p. 2303 - 2307 (2008/10/08)
The simple preparation of monoalkyl- and dialkylboranes previously developed by the addition of methyl iodide to lithium monoalkyl- and dialkylborohydrides in tetrahydrofuran solution has been expanded to alternative procedures involving other solvents, such as diethyl ether (EE) and n-pentane, and other reagents, such as phenol, acetic acid, methanesulfonic acid, ethereal hydrogen chloride, trimethylsilyl chloride, and trimethylsilyl methanesulfonate. The practicality of generating monoalkyl- and dialkylboranes from the corresponding borohydrides has been demonstrated in representative solvents utilizing appropriate reagents. The reaction of lithium borohydride with the above reagents was also studied. The reaction of lithium borohydride with 1 equiv of acetic acid produces a mixture of lithium tetraacetoxyborohydride and unreacted lithium borohydride instead of the expected lithium monoacetoxyborohydride. Because of discrepancies with the reported results for sodium borohydride, the study was extended to this reagent.
