Hydrochloric Acid → 6-(5-Trifluoromethyl-3-methyl-benzofuran-2-sulfonyl)-2H-pyridazin-3-one

HRID 2101443Notes

Reaction equation

C[O:2][C:3]1[N:4]=[N:5][C:6]([S:9]([C:12]2[O:13][C:14]3[CH:21]=[CH:20][C:19]([C:22]([F:25])([F:24])[F:23])=[CH:18][C:15]=3[C:16]=2[CH3:17])(=[O:11])=[O:10])=[CH:7][CH:8]=1.Cl>O1CCOCC1>[F:24][C:22]([F:23])([F:25])[C:19]1[CH:20]=[CH:21][C:14]2[O:13][C:12]([S:9]([C:6]3[CH:7]=[CH:8][C:3](=[O:2])[NH:4][N:5]=3)(=[O:10])=[O:11])=[C:16]([CH3:17])[C:15]=2[CH:18]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of 3-methoxy-6-(5-trifluoromethyl-3-methyl-benzofuran-2-sulfonyl)-pyridazine (1.34 mmol, 500 mg), conc. HCl (2 mL), and dioxane (4 mL) was heated at 100° C. for 2 hours. The reaction mixture was cooled and evaporated to dryness. Water (10 mL) was added to the residue. The resulting white solid was collected and air dried to obtain the desired product: 6-(5-trifluoromethyl-3-methyl-benzofuran-2-sulfonyl)-2H-pyridazin-3-one (56%, 270 mg); mp 244° C.-245° C.

Workup

temperatureThe reaction mixture was cooled
customevaporated to dryness
additionWater (10 mL) was added to the residue
customThe resulting white solid was collected
customair dried

Sources & evidence

ORD record: ord-a498c98797c846cbad3e051122006ed1
Source dataset: uspto-grants-2009_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07572910B2

Reaction notes

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