Methanol → 2-Methoxy-1-formylpiperidine

Participants

Reaction Steps

An electrode assembly consisting of an anode of glassy carbon, a nickel cathode and two bipolar connected electrodes of glassy carbon inserted between the two outer electrodes was fitted in the cell of the device as described in Example 1. All four electrodes were framed as described in Example 1. Polyethylene nets (mesh width 3×5 mm and thickness of filaments 0.5 mm) between the plates had the function of spacers. In this cell, a mixture of 4,800 g of 1-formylpiperidine, 13,600 g of methanol and 68 g of tetramethylammonium tetrafluoroborate was electrolyzed at 27.5 A, 45 volts and 25° C. for 27 hours and 33 minutes (corresponding to 2,273 Ahr). After distillative work up, 5,120 g of 1-formyl-2-methoxypiperidine were isolated, corresponding to a current efficiency of 80.3%.

Provenance & Evidence