lithium aluminium tetrahydride in tetrahydrofuran T=20°C; 1 h;

<b>Multi-step reaction with 3 steps<br /> </b>1.1: 95 percent / potassium carbonate / acetonitrile / 7 h / Heating<br />2.1: 100 percent / pyridine / CH₂Cl₂ / 13 h / 20 &deg;C<br />3.1: dicyclohexylboron triflate; triethylamine / CH₂Cl₂; hexane / 2 h / -78 &deg;C<br />3.2: 98 percent / CH₂Cl₂; hexane / 2 h / -78 - 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 4 steps<br /> </b>1.1: 100 percent / triethylamine / CH₂Cl₂ / 2 h / 0 - 20 &deg;C<br />2.1: 95 percent / potassium carbonate / acetonitrile / 7 h / Heating<br />3.1: 100 percent / pyridine / CH₂Cl₂ / 13 h / 20 &deg;C<br />4.1: dicyclohexylboron triflate; triethylamine / CH₂Cl₂; hexane / 2 h / -78 &deg;C<br />4.2: 98 percent / CH₂Cl₂; hexane / 2 h / -78 - 20 &deg;C<br /> <br /> &nbsp;