Unless noted otherwise, all reagents and solvents were purchased from commercial sources and used as received. All reactions were performed in a screw-capped vial. The proton ( 1 H) and carbon ( 13 C) NMR spectra were obtained using a 500 MHz using Me4Si as an internal standard and are reported in δ units. Coupling constants (J values) are reported in Hz. Column chromatography was performed on silica gel using flash chromatography (Teledyne ISCO EZprep).