To 7-methoxy-1,1-dimethyl-3,4-dihydro-1H-naphthalen-2-one (Compound A2, 845 mg), 3-bromo-2-(4-methoxy-benzyloxy)-pyridine (Compound GT15-15, 1.46 g), sodium t-butoxide (597 mg), palladium acetate (18.6 mg) and tri-tert-butylphosphine tetrafluoroboric acid (21 mg), toluene (10 ml) and THF (2 ml) were added and the mixture was stirred and heated at 90° C. for 2.5 hrs under nitrogen atmosphere. After cooling, the reaction mixture was added with saturated aqueous solution of ammonium chloride, and then extracted with ethyl acetate. The organic layer was washed with saturated brine, and the residues obtained after concentration under reduced pressure were purified by silica gel column (ethyl acetate/hexane) to obtain the title compound (140 mg, 8%).
