发明名称 |
PROCESS FOR PRODUCING ISATOIC ANHYDRIDES |
摘要 |
A process for producing isatoic anhydrides of the formula (II): (see fig. I) (II) which comprises reacting an anthranilic acid of formula (see fig II) (I) or a salt thereof with phosgene using a mixed solvent of water and an organic solvent miscible with water and inert to the reaction; conducting the reaction in the coexistence of an alkylpyridinium salt in an aqueous solvent; or using a mixed solvent of water and a specific amount of an organic solvent substantially immiscible with water and inert to the reaction.
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申请公布号 |
CA2193932(C) |
申请公布日期 |
2001.08.21 |
申请号 |
CA19962193932 |
申请日期 |
1996.12.24 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
NISHII, SHINJI;KOMATSU, MASASHI;UEDA, HIROSHI |
分类号 |
C07D265/26;(IPC1-7):C07D265/26;C07D413/02 |
主分类号 |
C07D265/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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