Hydrochloric Acid → HCID 19876596, compound

Participants

Reaction Steps

To a stirred suspension of 0.33 gram (0.002 mole) of 1,1'-carbonyldiimidazole in 2 mL of tetrahydrofuran was added dropwise a solution of 0.55 gram (0.002 mole) of 2-(4,6-dimethoxypyrimidin-2-yloxy)benzoic acid in 3 mL of tetrahydrofuran. Upon completion of addition, the reaction mixture was stirred at ambient temperature for 30 minutes, and then it was heated to reflux where it was stirred for an additional 30 minutes. After this time the reaction mixture was cooled, and 0.25 gram (0.002 mole) of 1-methylethylsulfonamide (prepared as in Example 1--Step H) was added. Upon completion of addition, the reaction mixture was stirred for 10 minutes, and 0.31 gram (0.002 mole) of 1,8-diazabicyclo[5.4.0]undec-7-ene was added. Upon completion of addition, the reaction mixture was stirred at ambient temperature for five hours. The reaction mixture was then poured into aqueous dilute hydrochloric acid. The mixture was extracted with ethyl acetate, and the extract was dried with magnesium sulfate. The mixture was filtered, and the filtrate was concentrated under reduced pressure to a residue. The residue was subjected to column chromatography on silica gel. Elution was accomplished using 10% and 20% ethyl acetate in methylene chloride. The appropriate fractions were combined and concentrated under reduced pressure to yield 0.2 gram of 2-[2-(1-methylethylsulfonylaminocarbonyl)phenoxy]-4,6-dimethoxypyrimidine; m.p. 128°-130° C., Compound 9 in Table I. The nmr spectrum was consistent with the proposed structure.

Provenance & Evidence