反应详情

316 Parts of N-(2,3-dihydro-2,2-dimethyl-1H-inden-1-yl)-N'-cyanoformamidine were suspended in 282 parts of N,N-dimethylformamide. To this suspension were added slowly 163 parts of 2-methyl-2-propanol potassium salt and after stirring at room temperature for 4 hours there were added dropwise 194 parts of bromopropanone. After 48 hours, the reaction mixture was poured into water and extracted with 1,1'-oxybisethane. The separated organic layers were evaporated and the residue was crystallized first from a mixture of 1,1'-oxybisethane and petroleum ether. The precipitate was filtered off and dried and then recrystallized from methylbenzene. The product was filtered off and dried, yielding 93 parts (23%) of [4-amino-1-(2,3-dihydro-2,2-dimethyl-1H-inden-1-yl)-1H-imidazol-5-yl]ethanone; mp. 174°-175° C.

1. waitAfter 48 hours
2. extractionextracted with 1,1'-oxybisethane
3. customThe separated organic layers were evaporated
4. customthe residue was crystallized first from a mixture of 1,1'-oxybisethane and petroleum ether
5. filtrationThe precipitate was filtered off
6. customdried
7. customrecrystallized from methylbenzene
8. filtrationThe product was filtered off
9. customdried