2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → HCID 14722317, compound

Participants

Reaction Steps

There were mixed 3.63 g of 2,3-dihydro-3-methoxy-7-methylsulfonylamino-6-phenoxy-4H-1-benzopyran4-one, 3.41 g of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and 150 ml of dioxane. The mixture was refluxed for 48 hours. The reaction mixture was cooled. The resulting precipitate was removed by filtration. The solvent was removed by distillation under reduced pressure. The residue was purified by a column chromatography (eluant: a 3 : 1 mixture of toluene and ethyl acetate) to obtain 1.91 g (yield: 52.9%) of 3-methoxy-7-methylsulfonylamino-6-phenoxy-4H-1-benzopyran-4-one [Compound No. 2].

Provenance & Evidence