6-(2,4-difluorophenyl)-2-isobutyl-4-phthalimidomethyl-2H-pyridazin-3-one 、
4-carboxy-2-isobutyl-6-[4-(methylthio)-phenyl]-2H-pyridazin-3-one 以to yield the title compound as a yellow oil (yield: 35.3%)的产率得到4-hydroxymethyl-2-isobutyl-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one