Substrate Scope of Hetrocycles^a.

^aReaction conditions: 0.25 mmol of 1, 0.3 mmol of 2 in presence of 10 mol% of MnBr(CO)₅, 20 mol% NaOAc in 2.0 mL of H₂O at 100 °C for 8 h under N₂.