Transition-Metal-Free Dehydropolymerization of Phosphine-Boranes at Ambient Temperature.

Autor: Wiebe MA; Department of Chemistry, University of Victoria, 3800 Finnerty Rd, Victoria, British Columbia, V8P 5 C2, Canada., Kundu S; Department of Chemistry, University of Victoria, 3800 Finnerty Rd, Victoria, British Columbia, V8P 5 C2, Canada.; Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas, New Delhi, 110016, India., LaPierre EA; Department of Chemistry, University of Victoria, 3800 Finnerty Rd, Victoria, British Columbia, V8P 5 C2, Canada., Patrick BO; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada., Manners I; Department of Chemistry, University of Victoria, 3800 Finnerty Rd, Victoria, British Columbia, V8P 5 C2, Canada.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2023 Jan 09; Vol. 29 (2), pp. e202202897. Date of Electronic Publication: 2022 Nov 15.
DOI: 10.1002/chem.202202897
Abstrakt: Stoichiometric reaction of phosphine-borane adducts RR'PH⋅BH 3 (R=Ph, R'=H, Ph, Et, and R=R'= t Bu) with the strong acid HNTf 2 (Tf=SO 2 CF 3 ) leads to H 2 elimination and the formation of the triflimido derivatives, RR'PH⋅BH 2 (NTf 2 ). Subsequent deprotonation by using bases, such as diisopropylethylamine or the carbene IPr (IPr=N,N'-bis(2,6-diisopropylphenyl)imidazol-2-ylidene), led to the formation of P-mono- or -disubstituted polyphosphinoboranes [RR'P-BH 2 ] n . Evidence for the intermediacy of transient phosphinoborane monomers, RR'PBH 2 , was provided by trapping reactions.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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