Abstract
We have described the palladium‐catalyzed regioselective cascade synthesis of phenanthridines and 6‐arylethynylphenanthridines in good to excellent yields from a reaction between Morita–Baylis–Hillman (MBH) acetates and terminal alkynes. These cascade reactions are temperature controlled and favor the formation of phenanthridines when conducted at 50 °C and of 6‐arylethynylphenanthridines when performed at 80 °C.
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