Potassium bisulfate → Flupyradifurone

Participants

Reaction Steps

3.9 g of potassium hydrogen sulphate are added at room temperature to a suspension of 4.1 g of 4-(dimethylamino)furan-2(5H)-one and 5 g of N-[(6-chloropyridin-3-yl)methyl]-2,2-difluoroethylamine in 50 ml of butyronitrile. The mixture is refluxed for 8 h. Thereafter, cooling at room temperature and washing twice with 50 ml of water are effected. The solvent is removed in vacuo. 6 g of 4-[[(6-chloropyridin-3-yl)methyl](2,2-difluoroethyl)amino]furan-2(5H)-one are obtained with a purity of 92% (82% yield).

Provenance & Evidence