Supported Ionic Liquid Phase (SILP) Allylic Alkylation of Amines in Continuous Flow
Kristof Stagel1, Ádám Márk Pálvölgyi1, Clémence Delmas1
1Institute of Applied Synthetic Chemistry TU Wien Getreidemarkt 9/163 1060 Wien Austria.
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We present the use of Pd-complex-containing supported ionic liquid phases (SILPs) as a novel approach for continuous-flow allylic alkylation of N-nucleophiles. This immobilization strategy gave simple access to air-tolerating catalyst frameworks, providing rapid and convenient access to various achiral and chiral N-allylation products. Under optimized conditions, the flow-reaction could be maintained for 3.5 hours with constant product output; meanwhile, only a marginal 0.7 wt % of ionic liquid leaching and no detectable palladium-complex leaching could be observed.
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