Ethyl Acetate → 4-(2-(2-Bromophenylamino)-3,4-dioxocyclobut-1-enylamino)-3-hydroxybenzonitrile

Participants

Reaction Steps

A mixture of 3-ethoxy-4-(2-hydroxy-4-cyanoanilino)-3-cyclobutene-1,2-dione (0.7 g, 2.71 mmol) and 2-bromoaniline (0.47 g, 2.73 mmol) were heated in 6 ml DMSO for overnight. The reaction mixture was cooled to room temperature, and ethylacetate was added and precipitates formed. The filtrate was partitioned between ethylacetate and water. The organic layer was dried over sodium sulfate and concentrated. After Gilson HPLC, 34 mg (3%) of purified product was obtained. LC/MS (H+) 386

Provenance & Evidence