5-Formyl-2-methyl-4-phenyl-1H-pyrrole-3-carboxylic acid methyl ester 、 boron difluoride complex of 3-acetyl-4-hydroxy-1-methyl-2-quinolone 在
乙酸酐 作用下,
以59%的产率得到4-difluoroboryloxy-3-[3-(4-methoxycarbonyl-5-methyl-3-phenylpyrrol-2-yl)prop-2-E-enoyl]-1-methyl-2-quinolone