Dimethylformamide → HCID 19883413, compound

Participants

Reaction Steps

A solution of 5-chloro-2-methoxy-4-(methylamino)benzoic acid (3.02 g, 0.014 mole) in anhydrous tetrahydrofuran (15 ml) under nitrogen was treated with 1,1'-carbonyldiimidazole (2.35 g, 0.0145 mole) and stirred for one hour. A solution/suspension of 3-aminomethyl-1-azabicyclo[2.2.2]octan-3-ol (2.34 g, 15 mole) in tetrahydrofuran (15 ml) containing a little N,N-dimethylformamide for solubility was added slowly over a few minutes, and the mixture was stirred overnight (18 hours) at room temperature and for one hour at 60° C., then concentrated in vacuo. The white solid was partitioned between 1.0N sodium carbonate (100 ml) and methylene chloride (200 ml) containing a little methanol, and the organic layer was separated. The aqueous solution was extracted with methylene chloride (2×50 ml) containing a little methanol, and the combined organic solution was dried (sodium sulfate) and passed through a short column of alumina (eluted with 10% methanol/methylene chloride). The filtrate was concentrated in vacuo, triturated from ether, and triturated from acetonitrile to afford 2.67 g (54%) of the title compound as a colorless solid; mp 236°-237° C. (dec).

Provenance & Evidence