Ethanesulfonylchloride, 2-chloro- → (4aS,8aR)-4-(3,4-Dimethoxy-phenyl)-2-(1-ethenesulfonyl-piperidin-4-yl)-4a,5,8,8a-tetrahydro-2H-phthalazin-1-one

Participants

Reaction Steps

A solution of 20 mmol of 2-chloroethylsulfonylchloride in 20 ml of dichloromethane is added to a solution of 15 mmol of compound 5c and 25 ml of diisopropylethylamine in 50 ml of dichloromethane. The resulting mixture is stirred at RT for 18 h, after which it is washed first with diluted hydrochloric acid and then with a saturated solution of sodium bicarbonate. After drying over magnesium sulfate and evaporating the solvent, the compound is crystallised from diethyl ether. M. p. 89-90° C.

Provenance & Evidence