2-Naphthoic acid → 5-{8-Methoxy-1-[4-(2-naphthoylamino)benzyl]-2-oxo-1,2,3,4-tetrahydroquinolin-5-ylmethyl}thiazolidin-2,4-dione

Participants

Reaction Steps

0.52 g of triethylamine and 0.42 g of diethylphosphoro cyanidate (DEPC) were added with ice cooling to a DMF solution (14 ml) of 0.7 g of 5-[1-(4-aminobenzyl)-8-methoxy-2-oxo-1,2,3,4-tetrahydroquinolin-5-ylmethyl]thiazolidine-2,4-dione and 0.59 g of 2-naphthoic acid, followed by stirring for 16 hours. Water and ethyl acetate were added to the reaction liquid, and the insoluble matter thus formed was collected by filtration. The collected insoluble matter was dissolved in a dichloromethane-methanol mixed solvent and concentrated. The residue was washed with diethylether and diisopropyl ether. The residue was dried under reduced pressure, giving 0.74 g (77% yield) of 5-{8-methoxy-1-[4-(2-naphthoylamino)benzyl]-2-oxo-1,2,3,4-tetrahydroquinolin-5-ylmethyl}thiazolidin-2,4-dione as a white amorphous solid.

Provenance & Evidence