ethyl 5-[3-[2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl]-2,4-dioxothieno[3,4-d]pyrimidin-1-yl]pentanoate 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
以96%的产率得到3-[3-[2-[4-(2-methoxyphenyl)piperazin-1-yl]-ethyl]-5-methyl-2,4-dioxothieno[3,4-d]pyrimidin-1-yl]-propanoic acid sodium salt