反应详情

To a mixture of 4-propyl-1,2,5-thiadiazolidin-3-one 1,1-dioxide (5.0 g, 28.25 mmol) suspended in 150 ml of toluene was added phenylmethyl bromide (5.32 g, 31.03 mmol) and tetrabutylammonium bromide (0.9 g, 0.28 mmol). The resulting mixture was refluxed for 19 hours, cooled, filtered, and the filtrate was concentrated in vacuo. The residue was purified by flash chromatography to afford 2.97 g (39%) of 2-phenylmethyl-4-propyl-1,2,5-thiadiazolidin-3-one 1,1-dioxide (Formula IX: R1 =H; R2 =propyl) as a solid, m.p., 63.5°-65.5° C.

1. temperatureThe resulting mixture was refluxed for 19 hours
2. temperaturecooled
3. filtrationfiltered
4. concentrationthe filtrate was concentrated in vacuo
5. customThe residue was purified by flash chromatography