反应详情

A mixture of 4.8 parts of 1-(3-chloropropyl)-1,3-dihydro-2H-benzimidazol-2-one, 5.6 parts of 3-methyl-1-phenyl-1,3,8-triazaspiro[4,5]decan-4-one hydrochloride, 7.4 parts of sodium carbonate and 200 parts of 4-methyl-2-pentanone is stirred and refluxed overnight with water-separator. The reaction mixture is cooled, water is added and the layers are separated. The 4-methyl-2-pentanone-phase is dried, filtered and evaporated. The residue is purified by column-chromatography over silica gel using a mixture of trichloromethane and 5% of methanol as eluent. The pure fractions are collected and the eluent is evaporated. The residue is triturated in 4-methyl-2-pentanone. The solid product is filtered off and dried, yielding 4.1 parts (50%) of 8-[3-(1,3-dihydro-2-oxo-2H-benzimidazol-1-yl)propyl]-3-methyl-1-phenyl-1,3,8-triazaspiro[4,5]decan-4-one; mp. 186° C.

1. temperatureThe reaction mixture is cooled
2. customthe layers are separated
3. dry with materialThe 4-methyl-2-pentanone-phase is dried
4. filtrationfiltered
5. customevaporated
6. customThe residue is purified by column-chromatography over silica gel using
7. additiona mixture of trichloromethane and 5% of methanol as eluent
8. customThe pure fractions are collected
9. customthe eluent is evaporated
10. customThe residue is triturated in 4-methyl-2-pentanone
11. filtrationThe solid product is filtered off
12. customdried