E. Anders et al., SYNTHESIS OF THIAZOLIDINE-4-CARBOXYLIC ACIDS AND N-(1-SULFONATOALKYL)PYRIDINIUM BETAINES FROM N-(1-CHLOROALKYL)PYRIDINIUM CHLORIDES, Bulletin des Societes chimiques belges, 106(7-8), 1997, pp. 383-386
N-(1-Chloroalkyl)pyridinium chlorides (1) react with L-cysteine to yie
ld thiazolidine-4-carboxylic acids. When salts 1 are not isolated, N-(
1-sulfonatoalkyl)pyridinium betaines can be obtained under particular
conditions.