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Thiazolidine numbering.png
IUPAC name
3D model (JSmol)
ECHA InfoCard 100.007.275
Molar mass 89.16 g·mol−1
Density 1.131 g/cm3[1]
Boiling point 72 to 75 °C (162 to 167 °F; 345 to 348 K)[1] at 25 torr
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Thiazolidine is a heterocyclic organic compound with the formula (CH2)3(NH)S. It is a 5-membered saturated ring with a thioether group and an amine group in the 1 and 3 positions. It is a sulfur analog of oxazolidine. Thiazolidine is a colorless liquid.

Derivatives, thiazolidines, are known. For example, the drug pioglitazone contains a thiazolidine ring. Another drug that contains a thiazolidine ring is the antibiotic penicillin.


Thiazolidine is prepared as it was in its first reported synthesis, by the condensation of cysteamine and formaldehyde.[2] Other thiazolidines may be synthesized by similar condensations. A notable derivative is 4-carboxythiazolidine, derived from formaldehyde and cysteine.

Thiazolidine with 2 ketones (at the 2 and 4 positions) provides the functional group of the thiazolidinediones.

See also[edit]


  1. ^ a b Thiazolindine
  2. ^ Ratner, Sarah; Clarke, H. T. (1937). "Action of formaldehyde on cysteine". Journal of the American Chemical Society. 59: 200–6. doi:10.1021/ja01280a050.