Water → 5-Amino-3-cyano-4-(2,5-dichlorofuran-3-yl)-1-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole

HRID 1274356Notes

Reaction equation

[NH2:1][C:2]1[N:6]([C:7]2[C:12]([Cl:13])=[CH:11][C:10]([C:14]([F:17])([F:16])[F:15])=[CH:9][C:8]=2[Cl:18])[N:5]=[C:4]([C:19]#[N:20])[C:3]=1[C:21]1[CH:25]=[CH:24][O:23][C:22]=1[Cl:26].[Cl:27]N1C(=O)CCC1=O.CCOCC.O>O1CCCC1>[NH2:1][C:2]1[N:6]([C:7]2[C:12]([Cl:13])=[CH:11][C:10]([C:14]([F:17])([F:15])[F:16])=[CH:9][C:8]=2[Cl:18])[N:5]=[C:4]([C:19]#[N:20])[C:3]=1[C:21]1[CH:25]=[C:24]([Cl:27])[O:23][C:22]=1[Cl:26]

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of 5-amino-4-(2-chlorofuran-3-yl)-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole (0.15 g) in tetrahydrofuran (7 ml) was added N-chlorosuccinimide (0.048 g). The mixture was left at room temperature for 24 hours and then heated at 50° C. for 3 hours and then left at room temperature for 96 hours. The reaction mixture was poured into ether (25 ml) and water (25 ml). The organic layer was washed with water (25 ml), then dried (Na2SO4) and evaporated. The residue was purified by column chromatography on silica gel (10 g) eluted with hexane:dichloromethane (50:50). Combination and evaporation of suitable fractions gave the title compound as a white solid, m.p. 193-194° C.

Workup

waitleft at room temperature for 96 hours
washThe organic layer was washed with water (25 ml)
dry with materialdried (Na2SO4)
customevaporated
customThe residue was purified by column chromatography on silica gel (10 g)
washeluted with hexane:dichloromethane (50:50)
customCombination and evaporation of suitable fractions

Sources & evidence

ORD record: ord-a3415e33b10840de891bda9bc8b5004a
Source dataset: uspto-grants-2000_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06156782

Reaction notes

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