“…White solid (52.5 mg, 70%), mp 167.5−168.1 °C. 1 H NMR (600 MHz, CDCl 3 ): δ 7.94 (d,J = 7.8 Hz,2H),5H),1H) 4, 171.6, 158.7, 138.1, 136.8, 132.9, 130.2, 128.9, 127.8, 126.2, 125.2, 124.1, 131.4, 119.2, 68.8, 42.2, 25.5, 22.7, 13.4 15 To a reaction tube equipped with a stir bar were added 3f (45.1 mg, 0.1 mmol), ethynylbenzene (16.5 μL, 0.15 mmol), PPh 3 (5.2 mg, 0.02 mmol), K 3 PO 4 (25.5 mg, 0.12 mmol), Pd(OAc) 2 (1.1 mg, 0.005 mmol), and DMSO (1 mL). The resulting mixture was then stirred at 80 °C (oil bath) under argon for 24 h. Upon completion, it was diluted with ethyl acetate (20 mL) and washed with water and brine.…”