反应详情

A mixture of 50 parts of ethyl 4-[[3-(2-furanylmethyl)-3H-imidazo[4,5-b]pyridin-2-yl]amino]-1-piperidinecarboxylate, 50 parts of potassium hydroxide, 400 parts of 2-propanol and 20 drops of water was stirred and refluxed for about 5 hours. The reaction mixture was evaporated and water was added to the residue. The product was extracted twice with 4-methyl-2-pentanone. The combined extracts were dried, filtered and evaporated. The solid residue was stirred in 1,1'-oxybisethane. The product was filtered off and dried, yielding 34 parts (85%) of 3-(2-furanylmethyl)-N-(4-piperidinyl)-3H-imidazo[4,5-b]pyridine-2-amine; mp. 159.0° C. (intermediate 68).

1. temperaturerefluxed for about 5 hours
2. customThe reaction mixture was evaporated
3. additionwater was added to the residue
4. extractionThe product was extracted twice with 4-methyl-2-pentanone
5. customThe combined extracts were dried
6. filtrationfiltered
7. customevaporated
8. stirringThe solid residue was stirred in 1,1'-oxybisethane
9. filtrationThe product was filtered off
10. customdried