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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1980360Generated: October 30, 2026

Methyl fluorosulfate → 3,4-Dichloro-2-methyl-5-ethoxycarbonylisothiazolium fluorosulfonate

https://huagongshe.com/reaction/1980360

Reaction equation

Participants

RoleNameHCIDCharge
ReactantMethyl fluorosulfateHCID 9870—
ReactantEthyl 3,4-dichloro-1,2-thiazole-5-carboxylateHCID 12889011—
Product3,4-Dichloro-2-methyl-5-ethoxycarbonylisothiazolium fluorosulfonateHCID 1288901399%

Reaction Steps

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-calcuated for C7H8Cl2FNO5S2 : Cl, 20.84; N, 4.12; S, 18.85. Found Cl, 20.56; N, 4.06; S, 18.89.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04508908
Source datasetuspto-grants-1985_04
ORD IDord-fa6e04e1eee048baa06eee7c6926691b
Source noteuspto-grants-1985_04