(4-Chlorophenyl)hydrazine → HCID 178435590, compound

Participants

Reaction Steps

A solution of 2.6 g of ethyl 4-chloro-6-ethyl-5,6,7,8-tetrahydroquinoline-3-carboxylate in 30 ml n-butanol is treated with 1.38 g of 4-chlorophenylhydrazine at room temperature under nitrogen. After stirring at room temperature overnight, the reaction mixture is heated at reflux for 41/2 hours. The reaction mixture is cooled to room temperature, the precipitate is filtered off, washed with hexane and air-dried to yield a yellow solid. The crude product is dissolved in 30 ml 1N NaOH and extracted with ether. The aqueous layer is then treated with 1.6 g of NH4Cl. The precipitate which forms is filtered off, washed with water, and dried in a vacuum oven at 120° overnight to yield 2,3,6,7,8,9-hexahydro-2-p-chlorophenyl-8-ethylpyrazolo[4,3-c]quinolin-3-(5H)-one, m.p. 318°-320°.

Provenance & Evidence