Ethyl Acetate → HCID 9907917, compound

Participants

Reaction Steps

A mixture of 10.66 g (0.04 mole) of 4-(3-bromopropylamino)-5-chloro-3(2H)-pyridazinone (II), 10.0 g (0.05 mole) of N-methyl-homoveratryl amine (VI) and 8 g of potassium hydrogen carbonate is suspended in 80 cm3 of acetone. The reaction mixture is refluxed for 8 to 12 hours. The reaction is followed by TLC (eluent: ethyl acetate: acetone:triethylamine==10:10:0.5 (II Rf=0.76), (VI Rf=0.14), (I Rf=0.47)). The mixture is filtered while hot, washed with acetone and the mother liquor is evaporated in vacuo. To the residue 50 cm3 of ethyl acetate are added. The possibly separated inorganic substance is filtered off and the filtrate is evaporated again. The residual viscous, oily product (14 to 15 g) is triturated twice with 50 cm3 of hot water in order to remove the unreacted starting substance of the formula (VI). The warm aqueous solution is decanted. The oily residue is dissolved in methanol and dried over magnesium sulfate. Upon adding a small amount of diisopropyl ether and cooling the mixture white porous substance separates. Thus 9 g (59.0%) of crude product are obtained. M.p.: 89-90° C. After recrystallization from diisopropyl ether 7.0 g (46.0%) of the title compound are obtained.

Provenance & Evidence