反应详情

A mixture of 38 parts of carbon disulfide, 6 parts of 1-[1-{3-[N-(2-aminophenyl)amino]propyl}-4-piperidinyl]-5-chloro-1,3-dihydro-2H-benzimidazol-2-one and 32 parts of ethanol is stirred and refluxed for 24 hours. The reaction mixture is evaporated and the residue is crystallized from ethanol. The product is filtered off and recrystallized from a mixture of N,N-dimethylformamide and water, yielding 3 parts (45.5%) of 5-chloro-1-{1-[3-(2,3-dihydro-2-thioxo-1H-benzimidazol-1-yl)propyl]-4-piperidinyl}-1,3-dihydro-2H-benzimidazol-2-one; mp. 266.6° C.

1. temperaturerefluxed for 24 hours
2. customThe reaction mixture is evaporated
3. customthe residue is crystallized from ethanol
4. filtrationThe product is filtered off
5. customrecrystallized from a mixture of N,N-dimethylformamide and water