Sodium Carbonate → 1-[2-[4-[5-Chloro-1-(4-fluorophenyl)-1H-indol-3-yl]-3,6-dihydro-1(2H)-pyridinyl]ethyl]-2-imidazolidinone

Participants

Reaction Conditions

Reaction Steps

5-chloro-1-(4-fluorophenyl)-3-(1,2,3,6-tetrahydropyridin-4-yl)indole (6.0 kg. 16.5 mol), 1-(2-chloroethyl)imidazolon (3.19 kg, 1.3 eq.), sodium carbonate (anhydrous) and methyl isobutyl ketone (60 L) were mixed. The reaction mixture was heated under N2-cover and stirring until 90-95° C., and was stirred over night at this temperature. The next day the reaction mixture was filtered while still hot. The apparatus and filter cake were washed with further 2.5 L of methyl isobutyl ketone. The combined filtrates were left over night for crystallisation. The product was isolated on a nutch, washed with 7.5 L n-Heptane and dried over night in vacuum at 60° C.

Provenance & Evidence