To a 10 mL CEM microwave test tube was charged with Cs2CO3 (147 mg, 0.45 mmol), PdCl2(PPh3)2 (20 mg, 0.028 mmol), 5-bromo-2′,3′,5′,6′-tetrahydrospiro[indene-1,4′-pyran]-3(2H)-one (51 mg, 0.18 mmol), 3-cyanophenylboronic acid (35 mg, 0.24 mmol), dioxane (3 mL) and H2O (0.1 mL), the system was swept with N2 and capped, and heated in a CEM microwave reactor at 100° C. for 10 min. The reaction mixture was diluted with DCM, washed with brine, dried over anhydrous Na2SO4, and filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-30%) to give 42 mg of 3-(3-oxo-2,2′,3,3′,5′,6′-hexahydrospiro[indene-1,4′-pyran]-5-yl)benzonitrile as white solid. MS ESI+ve m/z 304 (M+H)+.
