“…Compound 3h was prepared according to the literature methods with minor modifications. 18 General Procedure for the Synthesis of Compounds 4/5/6. Take 4aaa as an example; in a 25 mL Schlenk tube, to a mixture of Pd(OAc) 2 (2.2 mg, 0.01 mmol, 5 mol %), PPh 3 (5.2 mg, 0.02 mmol, 10 mol %), Cs 2 CO 3 (130.3 mg, 0.4 mmol, 2.0 equiv), and 1a (0.0666g, 0.2 mmol, 1.0 equiv) were added 2a (0.0175g, 0.24 mmol, 1.2 equiv) and 3a (0.0332g, 0.4 mmol, 2.0 equiv) in 2 mL of 1,4-dioxane.…”