sodium nitrite in N,N-dimethyl-formamide 5 h; Ambient temperature;

<b>Multi-step reaction with 2 steps<br /> </b>1: 50 percent / Pyridin / a) -45 deg C, 2 h, b) RT, 8 h<br />2: Pyridin / CH₂Cl₂ / -30 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 52 percent / pyridine / 2 h / -40 &deg;C<br />2: 96 percent / pyridine / CH₂Cl₂ / 2 h / -20 &deg;C<br /> <br /> &nbsp;