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Issue 42, 2020
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Synthesis of polyheterocyclic 1,1-diboryltriazenes by γ-nitrogen insertion of azides into activated B–B single bonds

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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.

Graphical abstract: Synthesis of polyheterocyclic 1,1-diboryltriazenes by γ-nitrogen insertion of azides into activated B–B single bonds

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Supplementary files

Article information


Submitted
30 Mar 2020
Accepted
12 Apr 2020
First published
13 Apr 2020

Chem. Commun., 2020,56, 5681-5684
Article type
Communication

Synthesis of polyheterocyclic 1,1-diboryltriazenes by γ-nitrogen insertion of azides into activated B–B single bonds

D. Prieschl, M. Arrowsmith, M. Dietz, A. Rempel, M. Müller and H. Braunschweig, Chem. Commun., 2020, 56, 5681
DOI: 10.1039/D0CC02305A

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