A 2 mL microwave vial was charged with 2,4-dibromothiophene (20 mg, 0.08 mmol), (3-cyano-4-isopropoxyphenyl)boronic acid (17 mg, 0.08 mmol), potassium carbonate (35 mg, 0.25 mmol) and 3:1 mixture of DME/H2O (4 mL). The reaction mixture was degassed by bubbling N2 through the stirred solution for 10 min. Pd(PPh3)4 (7 mg, 0.006 mmol) was added and the solution degassed for an additional 2 min. The vial was subjected to microwave irradiation at 70° C. for 30 min or until starting material consumed. 5-(4-bromothiophen-2-yl)-2-isopropoxybenzonitrile THIO INT-3 was used in the next experiment without purification. LCMS-ESI (m/z) calculated for C14H12BrNOS: 320.9; no M+ observed, tR=4.15 min.
