1,1-Dioxo-isothiazolidine, cas is 5908-62-3, it is a common heterocyclic compound, the thiazolidine compound, its synthesis route is as follows.
5908-62-3, Scheme 13d5-Hydroxy-4-(7-iodo- 1 , 1 -dioxo- 1 ,4-dihydro- 1 lambda6-benzo[ 1 ,2,4]thiadiazin-3-yl)-2-(3- methyl-butyl)-6-1hiophen-2-yl-2H-pyridazin-3-one (3a); (0.25 g, 0.438 mmol), potassium triphosphate (0.465 g, 2.19 mmol), sarcosine (0.023 g, 0.263 mmol), and copper (I) iodide (0.021 g, 0.110 mmol) were combined. Anhydrous N1N- dimethylformamide (3 mL) was added followed by isothiazolidine 1,1-dioxide (0.531 g, 4.38 mmol, prepared according to the procedure from Org. Lett; 5; 22; 2003; 4175- 4178). The solution was degassed while stirring under vacuum and the flask charged with nitrogen. The mixture stirred at 1000C for 16 h. LC-MS indicated the major product to be the amino acid intermediate. Additional isothiazolidine 1,1-dioxide (0.531 g, 4.38 mmol) was added. The solution was degassed while stirring under vacuum and the flask charged with nitrogen. The mixture stirred at 1000C for 16 h. LC-MS indicated complete reaction at this point.Upon cooling, the mixture was diluted with ethyl acetate (80 mL), washed with IM aqueous hydrochloric acid (2 x 10 mL), saturated aqueous ammonium chloride (10 mL), dried over magnesium sulfate filtered. Methyl alcohol (100 mL) was added and the desired product crystallized over a period of 2 h. Collection by filtration followed by rinsing with methyl alcohol (2 x 10 mL) followed by drying in vacuo for 3 h
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Reference£º
Patent; ANADYS PHARMACEUTICALS, INC.; WO2008/82725; (2008); A1;,
Thiazolidine – Wikipedia
Thiazolidine – ScienceDirect.com