Water → 2-Methyl-2-(3-pyridyl)thiazolidine-4-carboxylic acid

Reaktionsgleichung

[C:1]([C:4]1[CH:5]=[N:6][CH:7]=[CH:8][CH:9]=1)(=O)[CH3:2].[NH2:10][C@H:11]([C:14]([OH:16])=[O:15])[CH2:12][SH:13].O>C(O)C>[CH3:2][C:1]1([C:4]2[CH:5]=[N:6][CH:7]=[CH:8][CH:9]=2)[NH:10][CH:11]([C:14]([OH:16])=[O:15])[CH2:12][S:13]1

Komponenten

Versuchsvorschrift

A mixture of 3.63 g of 3-acetylpyridine, 3.63 g of L-cysteine, 25 ml of water and 25 ml of ethanol was refluxed for 24 hours. The reaction mixture was concentrated under reduced pressure, isopropanol was added to the residue, and the resultant powder was collected by filtration. Ethanol was added to the powder, the insoluble matter was filtered off, and the filtrate was concentrated to dryness. The residue was dissolved in water and adjusted to pH 6 by addition of diluted hydrochloric acid under ice cooling and stirring, and the resultant powder was collected by filtration, washed with ethanol and dried to give 2.54 g of 2-methyl-2-(3-pyridyl)thiazolidine-4- carboxylic acid.