5-(tert-Butoxycarbonyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine-2-carboxylic acid → HCID 18377335, compound

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Reaction Steps

5-t-Butoxycarbonyl-4,5,6,7-tetrahydro-thieno[3,2-c]pyridine-2-carboxylic acid (570 mg, 2.0 mmol) was dissolved in anhydrous tetrahydrofuran (10 ml), and the solution was mixed with 1,1-carbonyldiimidazole (320 mg, 2.0 mmol) and stirred at room temperature for 1 hour. The reaction solution was mixed with ammonia dioxane solution (0.5 M, 8.0 ml, 4.0 mmol) and the stirring was continued for 16 hours. The solvent was removed by evaporation from the reaction solution under a reduced pressure, and the residue was mixed with ethyl acetate and washed with water, hydrochloric acid (1 N), sodium hydroxide aqueous solution (1 N) and saturated brine. The organic layer was dried with anhydrous sodium sulfate, and the solvent was removed by evaporation under a reduced pressure to obtain 450 mg (1.6 mmol, 80% in yield) of the title compound.

Provenance & Evidence