methyl 4,7-dihydro-4,7-dioxobenzothiophene-2-carboxylate 、
2-甲氧基乙胺 在
silica gel 、
氯仿 作用下,
以
四氢呋喃 为溶剂,
反应 27.0h,
以to give methyl 4,7-dihydro-5-(2-methoxyethyl)amino-4,7-dioxobenzo[b]thiophene-2-carboxylate (1.5 g) as a yellow powder的产率得到methyl 4,7-dihydro-5-(2-methoxyethyl)amino-4,7-dioxobenzo[b]thiophene-2-carboxylate