copper(II) sulfate; sodium nitrite in water 0.166667 h;

1: 60 percent / NaNO2, conc. HCl / H2O / 0.83 h 2: 34 percent / sodium dithionite / aq. NaOH / 0.08 h 3: 60 percent / CuSO4, NaNO2 / H2O / 0.17 h View Scheme

1: 90 percent / sodium hydrogensulfite / H2O / 24 h / Heating 2: 60 percent / NaNO2, conc. HCl / H2O / 0.83 h 3: 34 percent / sodium dithionite / aq. NaOH / 0.08 h 4: 60 percent / CuSO4, NaNO2 / H2O / 0.17 h View Scheme

1: 34 percent / sodium dithionite / aq. NaOH / 0.08 h 2: 60 percent / CuSO4, NaNO2 / H2O / 0.17 h View Scheme

triethylamine; trichloromethyl chloroformate in dichloromethane T=-50°C; 1.33333 - 1.5 h; Product distribution / selectivity;