Chemoselective Rh-Catalyzed Allylic Alkylations of Chelated Enolates using Dienylcarbonates

[摘要]：Wilkinson's catalyst, RhCl(PPh(3))(3), was found to be an excellent catalyst not only for highly regio- but also chemoselective allylic alkylations of chelated enolates. In contrast to Pd-catalyzed reactions, the Rh-catalyzed version shows also a high degree of regioretention and proceeds without isomerization. Allylic substrates with competitive allylic subunits react selectively at the sterically least hindered allylic position, in comparison to Ru-catalyzed processes.

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