triethylamine in diethyl ether T=20°C; 3.5 h;

1: lithium perchlorate; trifluorormethanesulfonic acid / acetonitrile / 20 °C / |Electrochemical reaction; |Inert atmosphere 2: piperidine / acetonitrile / 12 h / 70 °C / |Inert atmosphere View Scheme

sodium hydride; potassium carbonate in toluene T=100°C; 2 h;