反应详情

温度

70 °C

A mixture of 2.21 parts of 1-(2-chloroethyl)-3-ethyl-2-imidazolidinone, 3.13 parts of cis-4-amino-5-chloro-2-methoxy-N-(3-methoxy-4-piperidinyl)benzamide, 1.58 parts of sodium carbonate and 90 parts of N,N-dimethylformamide was stirred and heated for 48 hours at 70° C. The reaction mixture was evaporated. Water was added and the product was extracted twice with dichloromethane. The combined extracts were washed with water, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol, saturated with ammonia, (95:5 by volume) as eluent. The first fraction was collected and the eluent was evaporated. The residue was crystallized from acetonitrile. The product was filtered off and dried, yielding 3.08 parts (67.8%) of cis-4-amino-5-chloro-N-[1-[2-(3-ethyl-2-oxo-1-imidazolidinyl)ethyl]-3-methoxy-4-piperidinyl]-2-methoxybenzamide; mp. 152.8° C. (compound 1).

1. customThe reaction mixture was evaporated
2. additionWater was added
3. extractionthe product was extracted twice with dichloromethane
4. washThe combined extracts were washed with water
5. customdried
6. filtrationfiltered
7. customevaporated
8. customThe residue was purified by column chromatography over silica gel using
9. additiona mixture of trichloromethane and methanol
10. customThe first fraction was collected
11. customthe eluent was evaporated
12. customThe residue was crystallized from acetonitrile
13. filtrationThe product was filtered off
14. customdried