1-Chloro-6,7-dimethoxyisoquinoline → 6-[4-(6,7-dimethoxyisoquinolin-1-yl)-1-piperazinyl]-3,4-dihydro-2(1H)-quinolinone

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Reaction Steps

1-Chloro-6,7-dimethoxyisoquinoline (0.63 g) and 6-(1-piperazinyl)-3,4-dihydro-2(1H)-quinolinone (1.30 g) were mixed at 200° C. for 1.5 hours under stirring. The mixture was dissolved in a mixture of chloroform and methanol (10:1 V/V) and subjected to a column chromatography on silica gel (eluent:methanol in chloroform, 0-2% V/V). The fractions containing the object compound were combined and concentrated and the residue was triturated with diisopropyl ether to give 6-[4-(6,7-dimethoxyisoquinolin-1-yl)-1-piperazinyl]-3,4-dihydro-2(1H)-quinolinone (0.44 g).

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