The carbene transfer to strong Lewis acids: copper is better than silver
- 1 February 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Dalton Transactions
- Vol. 50 (8), 2872-2879
- https://doi.org/10.1039/d1dt00235j
Abstract
A new convenient approach to the synthesis of useful N-heterocyclic carbene complexes of group 13 metals was successfully developed. We demonstrate that air-stable copper(I) diaminocarbene complexes are excellent carbene transfer reagents for the synthesis of (IMes or IPr)MCl3 with high yields (M = Al, Ga). Use of this simple method allowed for the first time to obtain (IPr)AlCl3, inaccessible via a free carbene route. In contrast to copper complexes, under the same conditions the more commonly used silver analog (IPr)AgCl reacts with MCl3 (M = Al, Ga, In) yielding only the homoleptic cationic complexes [(IPr)2Ag]+MCl4 −.Funding Information
- Saint Petersburg State University (12.65.44.2017)
- Russian Science Foundation (19-73-00228)
- Deutsche Forschungsgemeinschaft (Sche 384/35-1)
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