m-Chloroperbenzoic acid → 7-(2,5-Dichlorothiophen-3-yl)-4-methyl-5,6,7,8-tetrahydroquinolin-5-one-1-oxide

Participants

Reaction Steps

In benzene (15 ml) was dissolved 7-(2,5-dichlorothiophen-3-yl)-4-methyl-5,6,7,8-tetrahydroquinolin-5-one (1.09 g), and to the solution was added m-chloroperbenzoic acid (0.963 g). The mixture was stirred at room temperature for 1 hour, and to the mixture were added ethyl acetate (150 ml), saturated sodium hydrogen carbonate solution (200 ml) and sodium nitrite(200 mg). The mixture was shaken, and the separated upper layer was washed with water and concentrated under reduced pressure. The residue was washed with a mixture of isopropylether and ethyl acetate (2:1) to give 7-(2,5-dichlorothiophen-3-yl)-4-methyl-5,6,7,8-tetrahydroquinolin-5-one-1-oxide (1.04 g) as yellow crystals.

Provenance & Evidence