Ethanol → 2-amino-N-(5-benzenesulfonyl-1H-indazol-3-yl)-4-(4-methyl-piperazin-1-yl)-benzamide

Participants

Reaction Steps

N-(5-benzenesulfonyl-1H-indazol-3-yl)-4-(4-methyl-piperazin-1-yl)-2-nitro-benzamide (1.71 g, 3.29 mmol) was suspended in a mixture of tetrahydrofuran (17 mL), ethanol (33 mL), water (25 mL) and cyclohexene (17 mL), treated with 10% palladium on carbon and stirred under reflux. After two hours the reaction was cooled to room temperature and filtered over celite washing thoroughly with tetrahydrofuran. Evaporation of the filtrate and purification of the crude product by flash chromatography over silica gel (eluent: dichloromethane/methanol/33% NH4OH in 95:5:1 ratio) afforded 1.39 g of title compound as a yellow powder (86% yield).

Provenance & Evidence