Palladium chemistry ionic liquids

The use of ionic liquids in microwave chemistry has great potential and a number of research groups have introduced the use of ionic liquids in synthetic approaches43,44. l-Butyl-3-methylimidazolium hexafluorophosphate (bmimPF6) was recently evaluated as a solvent for the microwave-promoted Heck reaction45. Terminal arylations of electron-poor olefins were carried out rapidly with good-to-excellent yields, using the old-fashioned catalyst palladium chloride (Scheme 2.15). As an example, the... 

The formation of NHC complexes is clearly going to be important to the palladium chemistry seen in ionic liquids. The formation of such complexes has been seen to be advantageous (as in the Suzuki reaction) or disadvantageous (as in the telomerization of butadiene with methanol), depending on the particular system being investigated. What is yet to be seen is if the ionic liquid can be manipulated to generate NHC s with particular useful properties. 

Tuba, Z. and Kollar, L. (2003) Palladium-catalysed aminocarbonylation of steroidal 17-iodo derivatives in KAf-dialkyl-imidazolium-type ionic liquids. Green Chemistry, 5, 643-645. 

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