Synthesis of polyheterocyclic 1,1-diboryltriazenes by γ-nitrogen insertion of azides into activated B–B single bonds
Dominic Prieschl, Merle Arrowsmith, Maximilian Dietz, Anna Rempel, Marcel Müller, Holger Braunschweig
Abstract
The γ-nitrogen insertion of arylazides into the B-B bond of electron-rich cyclic μ-hydridodiboranes stabilised by one N-heterocyclic carbene (NHC) ligand leads to the expansion of the central C3B2 ring, yielding unsymmetrical polyheterocyclic 1,1-diboryltriazenes. The 2-benzyl-bridged analogues undergo further NHC ring expansion and thermally induced loss of N2.
Topics & Concepts
ChemistryNitrogenCombinatorial chemistryStereochemistryMedicinal chemistryOrganic chemistryOrganoboron and organosilicon chemistryCatalytic Cross-Coupling ReactionsSynthesis and characterization of novel inorganic/organometallic compounds