Sodium Carbonate → HCID 131716477, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2.4 parts of 2-bromo-5-methyl-1,3,4-thiadiazole, 5 parts of N-[1-(2-aminoethyl)-4-piperidinyl]-3-(2-ethoxyethyl)-3H-imidazo[4,5-b]pyridin-2-amine, 1.6 parts of sodium carbonate and 47 parts of N,N-dimethylacetamide was stirred overnight at 120° C. After cooling, the reaction mixture was poured into water and the product was extracted with trichloromethane. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol, saturated with ammonia, (97:3 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was converted into the ethanedioate salt in ethanol. The salt was filtered off and dried, yielding 1.23 parts (13.2%) of 3-(2-ethoxyethyl)-N-[1-[2-[(5-methyl-1,3,4-thiadiazol-2-yl)amino]ethyl]-4-piperidinyl]-3H-imidazo[4,5-b]pyridin-2-amine ethanedioate(1:2), hemihydrate; mp. 197.3° C. (compound 129). In a similar manner there is also prepared:

Provenance & Evidence