反应详情

A mixture of 4-propyl-5-methyl-1,2,5-thiadiazolidin-3-one 1,1-dioxide (9 g), phenylthiomethyl chloride (7.43 g) and tetrabutylammonium bromide (1 g) suspended in 200 ml of toluene was refluxed for 8 hours, cooled, and concentrated in vacuo. The residue was purified by flash chromatography (15%-20% ethyl acetate in hexane) to afford 8.5 g (88%) of 2-phenylthiomethyl-4-propyl-5-methyl-1,2,5-thiadiazolidin-3-one 1,1-dioxide (Formula VI: R1 =H; R2 =propyl; R3 =methyl).

1. temperaturewas refluxed for 8 hours
2. temperaturecooled
3. concentrationconcentrated in vacuo
4. customThe residue was purified by flash chromatography (15%-20% ethyl acetate in hexane)