反应详情

According to the procedure of Example 1, ethyl 6-(3-methoxy-4-hydroxyphenyl)-2,4-dioxo-5-hexenoate is reacted with hydrazine hydrate to afford ethyl-3-[β-(3-methoxy-4-hydroxyphenyl)ethenyl]-1H-pyrazole-5-carboxylate in 51% yield, mp=99°-101° C.