Step 2: 7 was dissolved in the fluorinated solvent (TFE, HFIP, TFE: CH2Cl2, TFA depending on choice of arene 2). The arene 2 (2.0 equiv) was added in one portion and the reaction was stirred at rt for 16 h. Upon completion of the reaction, the solvent was evaporated and product 3 was precipitated in Et2O and isolated by filtration. If product precipitation is difficult: methanol (1-3 mL) is added and the solution is stirred vigorously. This will provide a homogenous solution and after stirring for 5-15 min the product will precipitate.