1: 92 percent / ammonium formate / Pd/C / tetrahydrofuran; methanol / 20 °C 2: 75 percent / KOH; NH2NH2*H2O / ethane-1,2-diol / 1 h / Heating View Scheme

1: pyridine; phenyl chloroformate With CuCN*2LiBr in tetrahydrofuran T=20°C; 2: tert-butylzinc bromide in tetrahydrofuran T=20°C; 1 h; Further stages.;

ammonium formate; palladium on activated charcoal in tetrahydrofuran; methanol T=20°C;