(1-{4-[4-oxo-2-phenyl-7-(2H-pyrazol-3-yl)-4H-chromen-3-yl]-phenyl}-cyclobutyl)-carbamic acid tert-butyl ester 、 {1-[4-(7-bromo-6-methoxy-4-oxo-2-phenyl-4H-chromen-3-yl)-phenyl]-cyclobutyl} carbamic acid tert-butyl ester 以to give the title compound as a colourless oil (55 mg, 65%)的产率得到(1-{4-[6-methoxy-4-oxo-2-phenyl-7-(2H-pyrazol-3-yl)-4H-chromen-3-yl]-phenyl}-cyclobutyl)-carbamic acid tert-butyl ester