2-Hydroxyquinoline → 5,6,7,8-tetrahydro-1-(3-methyl-2-butenyl)-5-oxo-2(1H)-quinolinone

Participants

Reaction Steps

A mixture of 5,6,7,8-tetrahydro-5-oxo-(2(1H)-quinolinone (10.0 g), lithium hydride (0.79), an dimethylformamide (400 ml) was stirred for 3 hrs at 25° C., under nitrogen. 3-Methylbutenyl bromide (10.6 ) was added and the mixture was stirred for an additional eighteen hrs. The reaction mixture was concentrated and the residue was partitioned between ethyl acetate and water. The layers were separated and the aqueous layer was extracted with ethyl acetate. The combined organic extracts were washed with water and brine, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated. The residue was triturated with petroleum ether to afford 10.5 g (74%) of 5,6,7,8-tetrahydro-1-(3-methyl-2-butenyl)-5-oxo-2(1H)-quinolinone.

Provenance & Evidence