申请人:Fuji Photo Film Co., Ltd.
公开号:US04105656A1
公开(公告)日:1978-08-08
A process for preparing a 3-N-mono-substituted amino-4-substituted-5-pyrazolone which comprises replacing the hydrogen atom of the NH group at the 3-position of a 3-mono-substituted-5-pyrazolone with a protective group, halogenating the resulting compound to introduce a halogen atom into the 4-position, reacting the resulting compound with a 5- or 6-member heterocyclic compound containing two or more nitrogen atoms to replace the halogen atom at the 4-position with a nitrogen containing heterocyclic group, and hydrolyzing the resulting compound to remove the protective group.
一种制备3-N-单取代氨基-4-取代-5-吡唑酮的方法,包括将3-单取代-5-吡唑酮的NH基团上的氢原子替换为保护基,卤代所得化合物以引入卤原子到4位,将所得化合物与含有两个或多个氮原子的5-或6元杂环化合物反应,以用氮含杂环基取代4位上的卤原子,然后水解所得化合物以去除保护基。