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Alkylideneborate zwitterions and C–C coupling by atypical diboration of electron-rich alkynes

The combination of electron-rich diaminoalkynes and ditopic Lewis acids diboranes(4) leads to unusual uncatalysed diboration reactions involving internal Lewis adduct, zwitterion, and C–C bond formation. The products are novel multicyclic, charge-separated compounds with intramolecular dative bonds.

Autoren:   Julian Böhnke; Holger Braunschweig; Andrea Deißenberger; Theresa Dellermann; Rian D. Dewhurst; J. Oscar C. Jiménez-Halla; Stephanie Kachel; Hauke Kelch; Dominic Prieschl
Journal:   Chemical Communication
DOI:   10.1039/C7CC07409C
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