Sodium Hydroxide → HCID 13537754, compound

Participants

Reaction Conditions

Reaction Steps

Further, the suspension of 80 g of polyphosphoric acid and 80 ml of toluene was stirred at 100° C., 20 ml of toluene solution of above-mentioned compound (methyl 2-[4-(2-carboxyethylamino)-3-chlorophenyl]propionate) were added thereto and stirred for further 1 hour. After cooling, ice-water was added to the reaction mixture, then the mixture was poured into an aqueous solution of sodium hydroxide to adjust the pH to 9 to 10, followed by extraction with ethyl acetate. The organic layer was washed with water and saturated aqueous solution of sodium chloride, and dried over anhydrous sodium sulfate. The solvent was distilled off, and the residue was subjected to column chromatography on silica gel, eluted with a mixture of ether and hexane to give 6.4 g of methyl 2-(8-chloro-1,2,3,4-tetrahydro-4-oxoquinolin-6-yl)propionate (Compound 32).

Provenance & Evidence