methyl 5-cyclohex-3-en-1-yl-2-[(4-hydroxyanilino)methylidene]-3-oxopent-4-enoate 在
1,4-二氧六环 、
乙醚 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 4.0h,
以to obtain 1.4 g of methyl 6-(cyclohexen-4-yl)-1-(4-hydroxyphenyl)-4-oxo-1,4,5,6-tetrahydronicotinate having a melting point of 155°-157° C.的产率得到methyl 6-(cyclohexen-4-yl)-1-(4-hydroxyphenyl)-4-oxo-1,4,5,6-tetrahydronicotinate