Novel hydroboration of highly substituted alkenes catalysed by borohydride complexes of uranium, neodymium and zirconium
Abstract
Alkenes are hydroborated with LiBH4 in the presence of UCl4, NdCl3 or ZrCl4, by following the reactivity sequence tetramethylethylene > 1-methylcyclohexene 2-methylpropene or hex-1-ene (no reaction); treatment of U(BH4)4with tetramethylethylene affords the uranium tetrakis(thexylborohydride)[U(BH3R)4](R = CMe2CMe2H).