Experimental Part: All reagents were purchased from commercial sources and used without any further purification. Technical solvents were used unless otherwise stated. Anhydrous solvents were obtained by passing solvent through columns of molecular sieves in a solvent purification system. Flash chromatography employed 230-400 mesh silica gel. Solvents used for chromatography are quoted as volume/volume ratios. Analytical thin layer chromatography was performed using silica gel plates precoated with silica gel 60 F254 (0.2 mm) using UV light and 10% ethanolic solution phosphomolybdic acid dip to visualize the products. H NMR spectra were recorded at 298 K unless otherwise stated using Varian VXR (200 MHz) spectrometers. Data is expressed in parts per million (ppm) downfield shift from tetramethyl silane with residual solvent as an internal reference ( δ 7.26 ppm for chloroform) and is reported as position ( δ in ppm), multiplicity (s = singlet, d = doublet, t = triplet, q = quartet = multiplet), coupling constant (J in Hz) and integration (number of protons). C NMR spectra were recorded at 298 K unless otherwise stated using Bruker Avance III 100 MHz spectrometers with complete proton decoupling. Data is expressed in parts per million (ppm) downfield shifts relative to the internal reference ( δ 77.2 ppm for the central peak of deuterated chloroform) and is reported as position ( δ in ppm). IR spectra were recorded on a Perkin Elmer 688 spectrometer. Mass spectra were obtained on a Shimadzu QP 1000 spectrometer. High resolution mass spectra (HRMS) were recorded using electrospray ionization on a Time of Flight (TOF) mass spectrometer at National Taiwan University.