Synthesis of polyheterocyclic 1, 1-diboryltriazenes by γ-nitrogen insertion of azides into activated B–B single bonds. Issue 42 (22nd April 2020)

• Record Type: Journal Article
• Authors: Prieschl, Dominic; Arrowsmith, Merle; Dietz, Maximilian; Rempel, Anna; Müller, Marcel; Braunschweig, Holger
• Is Part Of: Chemical communications. Volume 56:Issue 42(2020)
• Page Start: 5681
• Page End: 5684
• Publication Date: 2020-04-22
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc02305a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The γ-nitrogen insertion of arylazides into the B–B bond of electron-rich cyclic μ-hydridodiboranes yields unsymmetrical polyheterocyclic 1, 1-diboryltriazenes, which may undergo further NHC ring expansion/fusion and thermally induced loss of N2 . 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 C3 B2 ring, yielding unsymmetrical polyheterocyclic 1, 1-diboryltriazenes. The 2-benzyl-bridged analogues undergo further NHC ring expansion and thermally induced loss of N2 .