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Improved Turnover Numbers in Palladium-Catalyzed Bisdiene Cyclization-Trapping using N-Heterocyclic Carbene Ligands

✍ Scribed by James M. Takacs; Suman Layek; Hector Palencia; Ross N. Andrews


Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
129 KB
Volume
347
Category
Article
ISSN
1615-4150

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## Abstract It was found that a nucleophilic __N__‐heterocyclic carbene could be utilized as a ligand for Pd(0)‐catalyzed bismetallative cyclization of enynes in the presence of Bu~3~SnSiMe~3~. An imidazolium salt having a bulky alkyl group attached to both nitrogen atoms of its imidazol‐2‐ylidene