Amine-boranes reactions promoted by lanthanide(II) ions.
Vladislava A KirkinaAlexander A KisselAlexander N SelikhovYulia V NelyubinaOleg A FilippovNatalia V BelkovaAlexander A TrifonovElena S ShubinaPublished in: Chemical communications (Cambridge, England) (2022)
The catalytic activity in amine-borane dehydrogenation is shown for the first time for Ln(II) species using complexes [{( p-t Bu-C 6 H 4 ) 2 CH} 2 M·L] (M = Yb, Sm, L = (DME) 2 , TMEDA). The protonation of M(II)-C bonds with HNR 1 R 2 BH 3 affords amidoborane complexes [M(NR 1 R 2 BH 3 ) 2 L], which under excess HNMe 2 BH 3 transform to [NMe 2 BH 2 NMe 2 BH 3 ] - derivatives, both serving as the dehydrocoupling intermediates.