Dimethyl Sulfoxide → HCID 178476601, compound

Participants

Reaction Steps

In a 50 ml three-necked flask, 1.36 ml of 30% aqueous hydrogen peroxide are added to a mixture of 200 mg of acetic acid 4-{2-cyano-5-[4-(6-fluoro-1H-benzimidazol-2-yl)-9H-carbazol-9-yl]phenylamino}-trans-cyclohexyl ester, obtained in the preceding stage, in 7.5 ml of ethanol and 3 ml of dimethyl sulphoxide and 0.96 ml of 1M sodium hydroxide, and the mixture is stirred for ¼ hour at ambient temperature. 40 ml of distilled water are added and the mixture is extracted with 3 times 40 ml of ethyl acetate. The combined organic phases are washed with twice 40 ml of a saturated solution of sodium chloride, dried over magnesium sulphate and evaporated to dryness under vacuum. The residue is chromatographed on silica gel (15-40 μm), elution being carried out with a mixture of dichloromethane and methanol (96/4 by volume). 170 mg of acetic acid 4-{2-carbamoyl-5-[4-(6-fluoro-1H-benzimidazol-2-yl)-9H-carbazol-9-yl]phenylamino}-trans-cyclohexyl ester are obtained in the form of an off-white solid, the characteristics of which are the following:

Provenance & Evidence