3-cyano-2-[α-oxo-β-(3,4-diphenylthiazolo-2-ylidino)butyramido-N-yl]-5,5-dimethyl-7-oxocyclohexeno[b]thiophene 、
氰乙酸乙酯 在
哌啶 作用下,
以
乙醇 为溶剂,
反应 6.0h,
以72%的产率得到3-cyano-2-[3-cyano-4-methyl-2,6-dioxo-5-(3-phenyl-4-oxothiazolideno-2-ylideno)pyridin-1-yl]-5,5-dimethyl-7-oxocyclohexeno[b]thiophene