To a flame-dried 10-mL microwave vial with a magnetic stir bar was added 4Å MS (10 mg). The reaction vial containing molecular sieves was flame-dried for 2 min under vacuum and then back filled with nitrogen using a dual manifold Schlenk line. This process was repeated 3 times. After the reaction vessel had cooled to room temperature, Cu(OAc)2 (5.4 mg, 0.03 mmol, 30 mol %), and oxime (0.15 mmol, 1.5 equiv) were added to the reaction vessel. The vial was sealed with a Teflon microwave cap, and then evacuated and backfilled with nitrogen three times using a dual manifold Schlenk line. A solution of stannane or boronic acid (0.1 mmol, 1.0 equiv) in DMF (0.5 mL, 0.2 M) was added to the reaction mixture. If an additive was added to the reaction it was added following the addition of DMF solution, and the reaction vessel was moved to a 60 °C oil-bath and heated for the stated time.