2-Chloroethyl methyl ether → 3-Isobutyryl-4-(2-methylphenylamino)-8-(2-methoxyethoxy)quinoline

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Reaction Steps

A mixture of 3-isobutyryl-4-(2-methylphenylamino)-8-hydroxyquinoline (5.0 g, 15.6 mmol), potassium t-butoxide (2.63 g, 23.4 mmol) and 2-chloroethyl methyl ether (2.85 ml, 31.2 mmol) in tetrahydrofuran (250 ml) was heated at reflux for 3 days, then the solvent evaporated. Water was added, the product extracted into dichloromethane, and the organic extracts dried and evaporated. Chromatography (silica gel, ethyl acetate/2% acetic acid/0-5% methanol) removed unchanged starting material, then further chromatography (silica gel, 1-1.5% methanol in dichloromethane) and crystallisation from petroleum ether (40-60) gave 3-isobutyryl-4-(2-methylphenylamino)-8-(2-methoxyethoxy)quinoline (0.67 g), m.p. 68°-70°.

Provenance & Evidence