6-(4-n-butoxy-3-methoxyphenyl)-3[2H]pyridazinone 、 6-(4-Ethoxy-3-methoxyphenyl)-3[2H]pyridazinone 以6-(4-sec.-butoxy-3-methoxyphenyl)-3[2H]pyridazinone, m.p. 168°, 6-[4-(3-methylbutoxy)-3-methoxyphenyl]-3[2H]pyridazinone, m.p. 170°, are obtained from the correspondingly substituted 3-benzoylacrylic acids的产率得到6-(4-sec.-butoxy-3-methoxyphenyl)-3[2H]pyridazinone