Selective functionalization of imidazolesvia an iodine–copper exchange reaction
Literature Information
Xiaoyin Yang, Paul Knochel
The reaction of protected 4,5-diiodoimidazoles with (PhMe2CCH2)2CuLi regioselectively provides 5-cuprated imidazoles, which readily react with various electrophiles furnishing functionalized imidazoles in good yields; remarkably, these resulting mono-iodoimidazoles undergo again an iodine–copper exchange reaction in the presence of sensitive functional groups, like an aldehyde or a ketone.
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