ChemicalBook CAS DataBase List 3-METHYL-1,3-THIAZOLANE-2,4-DIONE

3-METHYL-1,3-THIAZOLANE-2,4-DIONE synthesis

7synthesis methods

Product Name:3-METHYL-1,3-THIAZOLANE-2,4-DIONE
CAS Number:16312-21-3
Molecular formula:C4H5NO2S
Molecular Weight:131.15

To a solution of 2,4-thiazolidinedione (1 equiv) in 5 mL of DMF was added potassium carbonate (1.1 equiv) and halogen (1.1 equiv). The suspension was stirred at 80 oC overnight. Solvent was evaporated and the residue was purified by flash column chromatography ( petroleum ether/EtOAc, 5:1) to afford the product 3. 3-Methylthiazolidine-2,4-dione (3a) Following the previous procedure, 2,4-thiazolidinedione (500 mg, 4.3 mmol) and iodomethane (0.3 mL, 4.7 mmol). 3a as white solid (460 mg, 82%).

2295-31-0 Synthesis

2295-31-0
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77-78-1
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16312-21-3
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$32.00/250mg

Yield:16312-21-3 85%

Reaction Conditions:

Stage #1: thiazolidine-2,4-dionewith potassium carbonate in propan-2-one at 50 - 60; for 0.5 h;
Stage #2: dimethyl sulfate in propan-2-one at 50 - 60; for 12 h;

Steps:

Methylation of thiazolidine-2,4-dione (3):

To a suspension of K₂CO₃ (2.36 g, 17.1 mmol) in dry acetone (5 mL/1 mmol) 2,4-thiazolidinedione 3 (1 g, 8.54 mmol) was added and the mixture allowed to stir at 50-60 °C for 30 min. Later, Me₂SO₄ (1.6 mL, 17.1 mmol) was added at the same temperature and the resulting mixture was stirred for another 12 h. After completion of the reaction (TLC), the reaction was stopped by adding water. The reaction mixture was extracted with EtOAc (3 × 20 mL). The combined organic phases were washed with brine, dried over anhydrous Na₂SO₄, filtered and concentrated. The crude residue was then purified by column chromatography on silica gel with EtOAc/petroleum ether 5:95 afforded N-methylthiazolidine-2,4-dione (5a, 0.95 g, 85%) as a colorless oily liquid.

References:

Kotha, Sambasivarao;Sreevani, Gaddamedi;Dzhemileva, Lilya U.;Yunusbaeva, Milyausha M.;Dzhemilev, Usein M.;D’yakonov, Vladimir A. [Beilstein Journal of Organic Chemistry,2019,vol. 15,p. 2774 - 2781] Location in patent:supporting information

2295-31-0 Synthesis

2295-31-0
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$6.00/5g