1: KOH / ethanol 2: 94 percent / aq. NaOH, tetrabutylammonium bromide / CH2Cl2 / 16 h 3: 39 percent / Ph3SnH, AIBN / benzene / 6 h / Heating 4: 65 percent / sodium naphthalenide / tetrahydrofuran / 0.03 h 5: 71 percent / 10percent Pd/C / various solvent(s) / 56 h / 210 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 86 percent / pyridine / CH₂Cl₂ / 96 h<br /> <br /> &nbsp;

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