1: 89 percent / K2CO3 / acetone / Heating 2: 89 percent / AlBr3 / acetonitrile / 1 h / Ambient temperature 3: 95 percent / K2CO3 / methanol / 2 h / Heating 4: 89 percent / H2 / 10percent palladium on charcoal / ethyl acetate; methanol View Scheme