2011
DOI: 10.1039/c0cc05294a
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Catalytic dehydrocoupling of Me2NHBH3 with Al(NMe2)3

Abstract: The catalytic dehydrocoupling reaction of Me(2)NHBH(3) with Al(NMe(2))(3) gives the dimer [Me(2)NBH(2)](2) and the chain [(Me(2)N)(2)BH], involving the thermally-stable Al(III) hydride catalyst [{(Me(2)N)(2)BH(2)}(2)AlH].

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Cited by 62 publications
(50 citation statements)
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“…However, the activity of compound 4 as a dehydrocoupling catalyst for amine‐boranes is comparable to other main‐group catalysts. Wright and coworkers have shown that 5 mol % of Al(NMe 2 ) 3 catalytically dehydrocouples Me 2 NH ⋅ BH 3 with complete consumption (50 turnovers) at 50 °C in toluene after 48 h ,. IPr=N−B(Ph)Cl ( 4 ) (10 mol %) can also catalytically dehydrogenate Me 2 NH ⋅ BH 3 at 50 °C in C 6 D 6 with full H 2 loss from Me 2 NH ⋅ BH 3 after 16 h.…”
Section: Resultsmentioning
confidence: 99%
“…However, the activity of compound 4 as a dehydrocoupling catalyst for amine‐boranes is comparable to other main‐group catalysts. Wright and coworkers have shown that 5 mol % of Al(NMe 2 ) 3 catalytically dehydrocouples Me 2 NH ⋅ BH 3 with complete consumption (50 turnovers) at 50 °C in toluene after 48 h ,. IPr=N−B(Ph)Cl ( 4 ) (10 mol %) can also catalytically dehydrogenate Me 2 NH ⋅ BH 3 at 50 °C in C 6 D 6 with full H 2 loss from Me 2 NH ⋅ BH 3 after 16 h.…”
Section: Resultsmentioning
confidence: 99%
“…Importantly, in common with transition metal catalytic systems, the b-hydride elimination metal hydrides are proposed as key intermediates in the reactions. For example a 5 mol% loading of Al(NMe 2 ) 3 at 50 1C in toluene gives complete conversion after 48 h. 24 The reactivity at higher temperature is at the lower end of that observed for a range of transition metal catalysed systems. 2.1.2 B-N bond formation using group 3 metals.…”
Section: B-n Bond Formationmentioning
confidence: 99%
“…24 The reaction of Me 2 NHBH 3 with 8 mol% Al(NMe 2 ) 3 was followed by in situ 11 B NMR studies and showed the rapid formation of (Me 2 NBH 2 ) 2 under ambient conditions in addition to small quantities of (Me 2 N) 2 BH and a triplet at (d = 1.87 ppm, 1 J BH = 107 Hz) which was subsequently assigned to the hypervalent 5-coordinate Al III hydride [{(Me 2 N) 2 BH 2 } 2 AlH] (Fig. View Article Online alkyl/amido or b-diketiminate complexes with the catalytic activity in the order Mg 4 Ca 4 Sc, consistent with the stronger Lewis acidity/hardness of the smaller group 2 metals.…”
Section: B-n Bond Formationmentioning
confidence: 99%
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“…Stoichiometric reactions of amine-boranes with aluminium species have revealed possible reaction intermediates although the mechanism of the dehydrocoupling has not been unambiguously determined [139][140][141][142].…”
Section: Group 2 Metal-catalysed Dehydrocoupling Of Amine-boranesmentioning
confidence: 99%