Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 362, Issue 18, Pages 3912-3918Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.202000521
Keywords
Catalysis; Gold; Silicon; Enynes; Carbenes
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Funding
- Spanish Government (AEI/FEDER, UE) [CTQ-2016-76840-R, CTQ2017-87372-P]
- [BES-2017-079853]
- [FPU2016-07221]
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Here we report a gold(I)-catalyzed rearrangement for a special type of alkynylcyclopropanes, such as (6-ethynylbicyclo[3.1.0]hex-2-en-6-yl)silanes. These enynes evolved through an isomerization reaction towards the formation of isomeric alkynylcyclopropanes instead of the expected alkynylcyclohexadienes. A computational study on the reaction mechanism revealed the participation of a polycyclic gold(I) carbene complex as intermediate instead of a sigma-allylic gold cation which is in agreement with the expected influence in the energy of those intermediates due to the presence of the silyl group. Finally, this gold(I) carbene intermediate could be experimentally intercepted through intramolecular cyclopropanations.
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