Citric Acid → HCID 136060820, compound

Participants

Reaction Steps

To a suspension of sodium hydride (60% in oil, 0.15 g) in N,N-dimethylformamide (10 mL) was added diethyl malonate (0.53 g) at 0° C., and the mixture was stirred for 30 min. To the reaction mixture was added N-{2-[4-(chloromethyl)-1,3-thiazol-2-yl]-1H-indol-7-yl}-N-methylthiophene-2-sulfonamide (0.45 g) at 0° C., and the mixture was stirred at room temperature for 3 hr. To the reaction mixture was added 10% citric acid was added, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4) and concentrated. The obtained residue was subjected to silica gel column chromatography and the title compound (0.43 g, yield 72%) was obtained as a colorless oil from a fraction eluted with ethyl acetate-hexane (2:3, volume ratio).

Provenance & Evidence