O-Xylene → HCID 178433617, compound

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Reaction Steps

The mixture of 3.6 g of ethyl 4-chloro-2-methylquinolin-3-carboxylate, 1.8 g of phenylhydrazine and 40 ml of xylene is refluxed for 4 hours, cooled to room temperature, diluted with diethyl ether and filtered. The residue is dissolved in 50 ml of 2 N aqueous sodium hydroxide, the solution washed with diethyl ether and its pH adjusted to 8.5 with ammonium chloride. The precipitate formed is collected, washed successively with hot water, methanol and diethyl ether, to yield the 4-methyl-2-phenylpyrazolo[4,3-c]quinolin-3(5H)-one, showing in the IR-spectrum peaks at 874, 867, 858, 850, 822, 780, 765, 756, 750, 740 and 722 cm-1. Analogously the 4-methyl-2-(p-chlorophenyl)-pyrazolo[4-3,-c]quinolin-3(5H)-one is prepared, melting at 349°-350°.

Provenance & Evidence