1: 40 percent / K2CO3; tetrabutylammonium bromide / toluene / 24 h / Heating 2: 90 percent / Ni-Ra; hydrazine monohydrate / methanol / 0 °C 3: chlorobenzene / 24 h / Heating View Scheme

1: 90 percent / Ni-Ra; hydrazine monohydrate / methanol / 0 °C 2: chlorobenzene / 24 h / Heating View Scheme

in chlorobenzene 24 h; Heating;