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General. Melting points were determined on a Gallenkamp melting point apparatus using glass capillary tubes and are uncorrected. Unless otherwise stated, all reactions were carried out under a nitrogen atmosphere, using commercially available anhydrous solvents. Thin-layer chromatography was performed on glass-backed precoated Merck silica gel (60 F254) plates, and FCC (flash column chromatography) was carried out using 40-63 μm silica gel. NMR spectra were carried out on a Varian Mercury 400doi:10.1039/c1md00140j fatcat:3mxtykisk5ejzmihnwkpb43kvq