1-Azabicyclo(2.2.2)octane-4-methanol → 1-Azabicyclo[2.2.2]oct-4-ylmethyl(5-phenyl-1,3-thiazol-4-yl)carbamate hydrochloride

Beteiligte Stoffe

Reaktionsschritte

To a solution of 5-phenyl-1,3-thiazole-4-carboxylic acid (250 mg) in toluene (6 mL) were added dropwise TEA (221 μL) and DPPA (315 μL) at room temperature, followed by stirring at the same temperature for 40 minutes. Next, after stirring at 90° C. for 40 minutes, a solution of 1-azabicyclo[2.2.2]oct-4-yl methanol (241 mg) in DMF (2 mL)/toluene (2 mL) was added thereto, followed by heating under reflux for 2 hours. To the reaction liquid was added a saturated aqueous NaHCO3 solution, followed by extraction with EtOAc. The organic layer was washed with water and brine in this order, dried over MgSO4, and then filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by medium-pressure preparative liquid chromatography (YAMAZEN YFLC WPrep2XY, eluent; CHCl3:MeOH:28% aqueous ammonia=80:10:1) to obtain a yellow oily substance. To this solution in EtOH (2 mL) was added 4 M HCl/EtOAc (1 mL) at room temperature, followed by stirring, and the solvent was concentrated under reduced pressure. The residue obtained was recrystallized from EtOH/ether to obtain 1-azabicyclo[2.2.2]oct-4-ylmethyl(5-phenyl-1,3-thiazol-4-yl)carbamate hydrochloride (145 mg) as a yellow solid.

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