Sodium Carbonate → HCID 178432405, compound

Participants

Reaction Steps

A mixture of 4.4 parts of 6-(2-bromoethyl)-2,3-dihydro-7-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one monohydrobromide, 3.7 parts of 6-fluoro-3-(4-piperidinyl)-1H-indazole dihydrochloride, 4.25 parts of sodium carbonate and 120 parts of 4-methyl-2-pentanone was stirred for 6 hours at reflux temperature. After cooling, the reaction mixture was filtered. The precipitate was stirred in water and the whole was filtered again. The precipitated product was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (90:10 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from 2-propanol. The product was filtered off and dried, yielding 2.5 parts (48.3%) of 6-[2-[4-(6-fluoro-1H-indazol-3-yl)-1-piperidinyl]ethyl]-2,3-dihydro-7-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one; mp. 207.6° C. (compound 2).

Provenance & Evidence