Methyl fluorosulfate → 3,4-Dichloro-2-methyl-5-ethoxycarbonylisothiazolium fluorosulfonate
Reaktionsgleichung
[Cl:1][C:2]1[C:6]([Cl:7])=[C:5]([C:8]([O:10][CH2:11][CH3:12])=[O:9])[S:4][N:3]=1.[F:13][S:14]([O:17][CH3:18])(=[O:16])=[O:15]>>[F:13][S:14]([O-:17])(=[O:16])=[O:15].[Cl:1][C:2]1[C:6]([Cl:7])=[C:5]([C:8]([O:10][CH2:11][CH3:12])=[O:9])[S:4][N+:3]=1[CH3:18]Komponenten
3
Versuchsvorschrift
3,4-Dichloro-5-ethoxycarbonylisothiazole (6.0 g, 0.027 mol) and 4 ml of methyl fluorosulfonate were heated at 110° for 1 hr under a nitrogen atmosphere. The solid was washed with ether and benzene to yield 9.0 g (99%) of 3,4-dichloro-2-methyl-5-ethoxycarbonylisothiazolium fluorosulfonate, mp 118-123. Analysis - calculated for C7H8Cl2FNO5S2 : Cl, 20.84; N 4.12; S, 18.85. Found Cl, 20.56; N, 4.06; S, 18.89.
Aufarbeitung
- washThe solid was washed with ether and benzene