Analytical thin layer chromatography was carried out
on Merck DC-plastikfolien Kieselgel 60 F254 plates and products
were visualised by UV fluorescence. Flash column chromatography
was performed using Merck 40e63 mm silica gel.
Mass spectra were recorded on a VG-70SE mass spectrometer.
High-resolution mass spectra were recorded at a nominal
resolution of 5000.