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21.0 g (128.4 mmol) of 2-chloroquinoline are initially charged in 210 ml of ethanol. 64.3 g (1.3 mol) of hydrazine hydrate are added, and the mixture is stirred under reflux for 16 h. The mixture is then cooled to 0° C., and the solid formed is filtered off and washed with a little ethanol. The product is initially air-dried and then dried under high vacuum.

1. temperatureunder reflux for 16 h
2. customthe solid formed
3. filtrationis filtered off
4. washwashed with a little ethanol
5. customThe product is initially air-dried
6. customdried under high vacuum