caa a22 4500 475816056 CHVBK 20180406123810.0 cr unu---uuuuu 170329e20000801xx s 000 0 eng 10.1023/A:1004005109765 doi (NATIONALLICENCE)springer-10.1023/A:1004005109765 Electrochemical reduction of derivatives and isomers of ethylpicolinate [Elektronische Daten] [A.M. Romulus, A. Savall] Electrolysis of picolinic acid, 2-formylpyridine, 2-hydroxymethylpyridine, ethylnicotinate and ethylisonicotinate in aqueous sulfuric acid solutions was performed on a lead cathode in galvanostatic mode. Electrolyses of picolinic acid, ethylnicotinate and ethylisonicotinate were performed in aqueous solutions to prepare the different hydroxymethylpyridine isomers. Results were compared with those for ethylpicolinate: the chemical yield in 2-hydroxymethylpyridine is lower than that in 3-hydroxymethylpyridine while that in 4-hydroxymethylpyridine is better. Electrolyses of the intermediates 2-formylpyridine and 2-hydroxymethylpyridine in aqueous solutions were performed with a view to understanding the competition between the reduction of the side chain and that of the pyridine nucleus. Study of medium acidity, current density, concentration and temperature shows that electroreduction occurs on the pyridinic nucleus of the formylpyridine and the picoline principally and less on the other derivatives. Kluwer Academic Publishers, 2000 cathodic reduction nationallicence formylpyridines nationallicence hydroxymethylpyridines nationallicence picolinic acid nationallicence pyridinic esters nationallicence Romulus A.M. Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex, France aut Savall A. Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex, France aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/8(2000-08-01), 967-972 0021-891X 30:8<967 2000 30 10800 https://doi.org/10.1023/A:1004005109765 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1004005109765 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Romulus A.M. Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex, France aut NATIONALLICENCE 700 1- Savall A. Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex, France aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/8(2000-08-01), 967-972 0021-891X 30:8<967 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer