1: 83 percent / pyridine / diethyl ether / 1 h / 0 °C 2: 1.) ozonized air, 2.) dimethyl sulfide / 1.) methanol, -78 deg C, 2.) room temperatuer, 40 min; 3: 86 percent / diethylenetriamine / methanol / 20 h / 30 °C View Scheme

iron; ammonium chloride in ethanol; water 1 h; Heating;

1: 70 percent / HNO3; AcOH / 2 h / 5 °C 2: 80 percent / iron; NH4Cl / ethanol; H2O / 1 h / Heating View Scheme