2,6-Dihydroxy-4-methylquinoline → 4-Methyl-6-{3-[4-(2-propoxybenzyl)-piperazin-1-yl]-propoxy}-2-oxo-1,2-dihydroquinoline

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Reaction Steps

In a manner analogous to that described in Example 9, 4-methyl-6-hydroxy-2-oxo-1,2-dihydroquinoline is reacted with 3-[4-(2-propoxybenzyl)-piperazin-1-yl]-propyl chloride. There is obtained 4-methyl-6-{3-[4-(2-propoxybenzyl)-piperazin-1-yl]-propoxy}-2-oxo-1,2-dihydroquinoline in a yield of 53% of theory in the form of an oily base. The corresponding hydrochloride is obtained from an acetone solution of the base, by the addition of ethereal hydrochloric acid, in amorphous fomrm with a melting point of about 140°-145° C.

Provenance & Evidence