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A Palladium-Catalyzed Carbonylative Cross-Coupling Route to Imidazolones
A. R. Siamaki, D. A. Black, B. A. Arndtsen*
McGill University, Montreal, Canada
19 March 2008 (online)
Reported is the one-pot synthesis of diaryl- and triaryl-substituted imidazolones by reaction of readily available chloroformates, imines, carbon monoxide, and stannanes under Pd-catalyzed conditions. The procedure was developed incrementally and a catalytic cycle for the carbonylative cross-coupling is proposed. Although the reaction technically has two steps, these both occur in the same reaction vessel.