sodium thiomethoxide in methanol T=0°C; Title compound not separated from byproducts;

<b>Multi-step reaction with 4 steps<br /> </b>1: 77 percent / pyridine; DMAP / CH₂Cl₂ / 0 &deg;C<br />2: ethyl acetate / 72 h / 20 &deg;C<br />3: Et₃N / benzene / 0.25 h<br />4: 275 mg / benzene / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 5 steps<br /> </b>1: 93 percent / dimethylformamide / 20 h / 20 &deg;C<br />2: 77 percent / pyridine; DMAP / CH₂Cl₂ / 0 &deg;C<br />3: ethyl acetate / 72 h / 20 &deg;C<br />4: Et₃N / benzene / 0.25 h<br />5: 275 mg / benzene / 20 &deg;C<br /> <br /> &nbsp;