potassium carbonate in N,N-dimethyl-formamide T=155 - 160°C; 3 h;

1: 92 percent / hydroxylamine hydrochloride, sodium formiate / formic acid / 1 h / Heating 2: 80 percent / K2CO3 / dimethylformamide / 3 h / 155 - 160 °C View Scheme

1: 90 percent / piperidine / 24 h / 100 °C 2: 34 percent / triethylphosphite / 20 h / Heating View Scheme