Propylene Oxide → 6-Methoxy-4-methyl-8-nitro-5-(8-phenyloctoxy) quinoline

Participants

Reaction Steps

To a stirred mixture of 5-hydroxy-6-methoxy-4-methyl-8-nitroquinoline (4.98 g, 0.02 mol), 1-bromo-8-phenyloctane (4.7 g, 0.017 mol) and HMPA (13 ml), at 120° C., was added, dropwise, during 1 h, a mixture of propylene oxide (6 ml) and Et3N (1 ml). The reaction was continued for 3.5 h, allowed to cool and extracted successively with pet ether, Et2O and Me2CO leaving 1 g of insoluble starting material, 5-hydroxy-6-methoxy-4methyl-8-nitroquinoline. The combined pet ether and Et2O extracts were washed (H2O, dil NaOH, H2O), dried (Na2SO4) and concentrated. The residue was dissolved in CHCl3, placed on a silica gel column and eluted with CHCl3. Concentration of the eluates left an oil which was triturated with pet ether to give 4.35 g (60%) of 6-methoxy-4-methyl-8-nitro-5(8-phenyloctoxy) quinoline as yellow solid, mp 39.5°-41° C. Crystallization from hexane (Darco) provided the analytical sample as yellow crystals, mp 41°-42° C.

Provenance & Evidence