1: sodium hydroxide / dioxane / 17 h / Ambient temperature; further solvents were also used 2: Adogen, sodium dithionite, NaHCO3 / cyclohexane; H2O / 2 h / Heating 3: pyridine / 4 h / Ambient temperature View Scheme

1: sodium hydroxide / dioxane / 17 h / Ambient temperature; further solvents were also used 2: Adogen, sodium dithionite, NaHCO3 / cyclohexane; H2O / 2 h / Heating View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 90 percent / NaI / dimethylformamide / 42 h / 60 &deg;C<br /> <br /> &nbsp;

&nbsp;Multistep reaction;&nbsp;<br /> &nbsp;