反应详情

The title compound was prepared by the method of Example 3 using the title product of Example 1 (3 g, 13 mmol) instead of the title product of Example 2. Chromatography by of the crude residue on silica gel using 50--50 ethyl acetate heptane gave the title compound (2.2 g) as a white powder, m.p. 32.6°-36.7° C. (DSC). The structure was supported by NMR, infrared spectroscopy, elemental analysis and mass spectroscopy.