4-Methylpyridine → 1,1'-{Disulphanediylbis[ethane-2,1-diylimino(2-oxoethane-2,1-diyl)]}bis(4-methylpyridinium)dichloride

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6.1 g of N,N′-(disulfanediyldiethane-2,1-diyl)bis(2-chloroacetamide) and 4.5 g of 4-picoline was dissolved in 50 ml of NMP and brought to 80° C. for 19 h. After cooling the mixture, with successive precipitations from acetone and drying under vacuum, 9.2 g of salts were recovered. The analyses showed that the product was in conformity. 1H NMR (400 MHz, D2O): 2.61 (s, 6H), 2.82 (t, 4H), 3.56 (t, 4H), 5.31 (s, 4H), 7.85 (d, 4H), 8.51 (d, 4H).

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