1: 23 percent / benzene; diethyl ether / 3 h / -30 °C 2: 1) N2H4*H2O, 2) KOH, 3) HJ / 1) N2H4*H2O, diethyleneglycol, 140 deg C, 1.5 h, 2) KOH, 180 deg C, 2 h View Scheme

1.1: acetonitrile-D3 / 20 °C / |Inert atmosphere 2.1: 2,6-dimethylpyridine / acetonitrile / 18 h / 80 °C / |Inert atmosphere 3.1: trifluorormethanesulfonic acid / acetonitrile / 2 h / 60 °C / |Inert atmosphere 3.2: 60 °C / |Inert atmosphere View Scheme

1.1: acetonitrile-D3 / 20 °C / |Inert atmosphere 2.1: 2,6-dimethylpyridine / acetonitrile / 18 h / 80 °C / |Inert atmosphere 3.1: trifluorormethanesulfonic acid / acetonitrile / 2 h / 60 °C / |Inert atmosphere 3.2: 60 °C / |Inert atmosphere View Scheme

potassium hydroxide; hydrogen iodide; hydrazine hydrate 1) N2H4*H2O, diethyleneglycol, 140 deg C, 1.5 h, 2) KOH, 180 deg C, 2 h; Yield given. Multistep reaction;