2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → HCID 14722319, compound

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Reaction Steps

350 mg of 2,3-dihydro-7-methylsulfonylamino-3-methylthio-6-phenoxy-4H-1-benzopyran-4-one and 1.08 g of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone were refluxed in 14 ml of dioxane for 9 hours. The solvent was removed by distillation under reduced pressure. The residue was purified by a column chromatography (eluant: a 10 : 1 mixture of toluene and ethyl acetate) to obtain 160 mg (yield: 45.7%) of 7-methylsulfonylamino-3-methylthio-6-phenoxy-4H-1-benzopyran-4-one [Compound No. 4].

Provenance & Evidence