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Reagents: (a) Herrmann’s palladacycle, [(tBu)3PH]BF4, Mo(CO)6, DBU, 1,4-dioxane, microwave irradiation at 140 °C for 25 min (7, 50%; 8, 64%; 9, 62%); (b) CDI, DBU, THF, 60 °C → rt (10, 71%; 11, 69%); (c) 4.0 M HCl in 1,4-dioxane (quantitative).
