1: 85 percent / N,N-diisopropylethylamine / CH2Cl2 / 0.17 h / 0 °C 2: 88 percent / Ph3P; tris(dibenzylideneacetone)palladium / dimethylformamide / 3 h / 75 - 80 °C 3: 86 percent / NaOH; H2O / ethanol / 0.5 h / Heating View Scheme