Iodine → HCID 54068353, compound

Participants

Reaction Steps

288 mg of 6-trifluoromethyl-1-(1-methoxyeth-2-yl)-1,2,3,4-tetrahydro-2,3-dioxoquinoxaline is mixed in 5 ml of glacial acetic acid with 0.05 ml of water, 0.012 ml of concentrated sulfuric acid, 34.4 mg of iodic acid and 88.4 mg of iodine and heated for 4 hours to 80° C. After concentration by evaporation, it is taken up in water, adjusted alkaline and extracted with methylene chloride. The organic phase is dried, filtered and concentrated by evaporation and the residue is chromatographed on silica gel with toluene:glacial acetic acid:water=10:10:1 as eluant. 40 mg of 6-trifluoromethyl-7-iodo-1-(1-methoxyeth-2-yl)-1,2,3,4-tetrahydro-2,3-dioxoquinoxaline is obtained. The residue is starting material, which can be used again in the reaction.

Provenance & Evidence