IMPROVED SYNTHESIS OF MONOALKYLBORANE DERIVATIVES VIA BIS(THEXYLBORANE)-N,N,N',N'-TETRAMETHYLETHYLENEDIAMINE

Bis(thexylborane)-Ar, N, Ar', Ar'-tetramethylethy-lenediamine (2ThBH2-TMED) reacts with olefin with the facile displacement of tetramethylethylene and the formation of the corresponding bis(monoalkylborane)-tetramethyl-ethylenediamine adducts in nearly quantitative yield. Treatment of the adducts with boron trifluoride etherate quantitatively precipitates TMED-2BF3 and liberates free monoalkylborane providing a convenient general synthesis for such monoalkylboranes. © 1979, American Chemical Society. All rights reserved.