Waters 2545 binary gradient module

Starting materials and other reagents were purchased from commercial suppliers and were used without further purification unless otherwise noted. All reactions were monitored by thin layer chromatography (TLC) with 0.25 mm E. Merck pre-coated silica gel plates (60 F254) and Waters LCMS system (Waters 2489 UV/Visible Detector, Waters 3100 Mass, Waters 515 HPLC pump, Waters 2545 Binary Gradient Module, Waters Reagent Manager, Waters 2767 Sample Manager) using SunFireTM C18 column (4.6 × 50 mm, 5 μm particle size): solvent gradient = 100% A at 0 min, 1% A at 5 min; solvent A = 0.035% TFA in Water; solvent B = 0.035% TFA in CH3CN; flow rate : 2.5 mL/min. Purification of reaction products was carried out by flash chromatography using CombiFlash®Rf with Teledyne Isco RediSep®Rf High Performance Gold or Silicycle SiliaSepTM High Performance columns (4 g, 12 g, 24 g, 40 g, 80 g, or 120 g). The purity of all compounds was over 95% and was analyzed with Waters LCMS system. ¹H NMR and ¹³C NMR spectra were obtained using a Varian Inova-400 (400 MHz for 1H, and 75 MHz for 13C) spectrometer. Chemical shifts are reported relative to chloroform (δ = 7.24) for ¹H NMR or dimethyl sulfoxide (δ = 2.50) for ¹H NMR and dimethyl sulfoxide (δ = 39.51) for ¹³C NMR. Data are reported as (br = broad, s = singlet, d = doublet, t = triplet, q = quartet, m = multiplet).