Sodium Bicarbonate → 9-Amino-6,6-dimethyl-8-(1-methyl-piperidin-4-yl oxy)-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile

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Reaction Steps

6,6-Dimethyl-8-(1-methyl-piperidin-4-yloxy)-9-nitro-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile (Compound D1, 83 mg, 0.19 mmol) was dissolved in ethanol, added with aqueous solution of ammonium acetate and aqueous solution of titanium (III) chloride, and then the mixture was stirred at room temperature for 45 min. The reaction solution was added to saturated aqueous solution of sodium hydrogen carbonate and then extracted with ethyl acetate. The organic layer was washed with brine and dried over sodium sulfate. The drying agent was removed by filtration and the residues were concentrated under reduced pressure to obtain the title compound (yellow solid, 60 mg, 78%).

Provenance & Evidence