反应详情

To a solution of 2-phenylthiomethyl-4-isopropyl-5-methyl -1,2,5-thiadiazolidin-3-one 1,1-dioxide (6.38 g, 23.31 mmol) in 150 ml of methylene chloride was added sulfuryl chloride (2.5 ml, 30.4 mmol) and the mixture was stirred for 2 hours at room temperature. The mixture was concentrated in vacuo and the residue triturated in hexane to afford 4.32 g (88%) of 2-chloromethyl-4-isopropyl-5-methyl-1,2,5-thiadiazolidin-3-one 1,1-dioxide (Formula II: R1 =H; R2 =isopropyl; R3 =methyl; X'=Cl) as a solid, m.p. 118.5°-119.5° C.

1. concentrationThe mixture was concentrated in vacuo
2. customthe residue triturated in hexane