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A mixture of N-(1,6-dichloro-2-naphthyl)carbamic acid ethyl ester (750 mg, 2.64 mmol) and KOH (1.78 mg, 31.7 mmol) in ethanol (20 mL) is heated to reflux temperature under a N2 atmosphere for 12 hours. After cooling to room temperature, water (10 mL) is added. The resulting precipitation is removed by filtration to give 1,6-dichloro-2-aminonaphthalene as a solid.

1. temperatureis heated
2. temperatureto reflux temperature under a N2 atmosphere for 12 hours
3. customThe resulting precipitation
4. customis removed by filtration