Sodium Carbonate → 3-[4-[3-[4-(4,5-Dihydro-2-oxazolyl)phenoxy]propyl]-1-piperazinyl]-6-(methylthio)pyridazine

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Reaction Steps

A mixture of 2.4 parts of 3-chloro-6-(methylthio)pyridazine, 4.5 parts of 1-[3-[4-(4,5-dihydro-2-oxazolyl)phenoxy]propyl]piperazine, 1.6 parts of sodium carbonate and 80 parts of 1-butanol was stirred for 5 days at reflux temperature. The reaction mixture was evaporated and the residue was dissolved in trichloromethane. The organic phase was washed with water, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (97:3 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 0.7 parts (11.2%) of 3-[4-[3-[4-(4,5-dihydro-2-oxazolyl)phenoxy]-propyl]-1-piperazinyl]-6-(methylthio)pyridazine; mp. 163.1° C. (comp. 83).

Provenance & Evidence