{1-[4-(6-fluoro-4-oxo-2-phenyl-4H-chromen-3-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester   、                                                                                      
7-iodo-2-isopropyl-8-phenyl-2H-9-oxa-1,2-diaza-cyclopenta[a]naphthalen-6-one                                                                                                                                                                                                                                                                                                          以to give the title compound as a colourless gum (48.3 mg, 85%)的产率得到{1-[4-(2-isopropyl-6-oxo-8-phenyl-2,6-dihydro-9-oxa-1,2-diaza-cyclopenta[a]naphthalen-7-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester