0.14 ml of 2M aqueous sodium carbonate solution and 5.7 mg (0.007 mmol) of PdCl2(dppf) are added to a mixture of 56mg (0.14 mmol) of N-[(3R)-1-azabicyclo[2.2.2]oct-3-yl]-7-bromo-1-benzothiophene-2-carboxamide hydrochloride (Example 8A) and 18.7 mg (0.15 mmol) of phenylboronic acid in 1 ml of DMF. The reaction mixture is heated to 80° C. After 3 h at this temperature, a further 5.7 mg (0.007 mmol) of PdCl2(dppf) are added, and the mixture is stirred at 80° C. for a further 12 h. The reaction mixture is filtered through kieselguhr and evaporated to dryness. Purification of the crude product by preparative HPLC, subsequent addition of 1N hydrochloric acid and drying under high vacuum result in 10.6 mg (18% of theory) of the title compound.
