Water → HCID 54322478, compound

Participants

Reaction Steps

2,4-Dihydro-4-[2-[4-(4-methoxyphenyl)-1-piperazinyl]-5-pyrimidinyl]-3H-1,2,4-triazol-3-one (0.019 mol) and N,N-dimethylformamide (200 ml) were stirred. A solution of sodium bis(trimethylsilyl)amide in tetrahydrofuran (1M) (21 ml) was added dropwise under N2 and the mixture was stirred for 30 minutes at room temperature. 2-Bromo-1-(4-chlorophenyl)-1-butanone (0.021 mol) dissolved in a little N,N-dimethylformamide was added dropwise and the mixture was stirred for 3 hours at room temperature. The mixture was poured into water and extracted with dichloromethane. The organic layer was washed with water, dried and evaporated. The residue was crystallized from 1-propanol. The precipitate was faltered off and dried in vacuo at 75° C., yielding 6 g (60%) of (±)-2-[1 -(4-chlorobenzoyl)propyl]-2,4-dihydro-4-[2-[4-(4-methoxyphenyl)-1-piperazinyl]-5-pyrimidinyl]-3H-1,2,4-triazol-3-one; mp. 184.6° C. (comp. 8).

Provenance & Evidence