发明名称 |
Process for preparation of 4-mercapto-1-naphthol compounds |
摘要 |
A process for preparation of 4-mercapto-1-naphthol compounds which comprises the steps of: (i) obtaining a 4-heterocyclylthio-1-naphthol compound by reacting a 1-naphthol compound with a heterocyclylsulfur chloride or by reacting a 4-iodo-1-naphthol compound with an alkali metal or ammonium salt of a mercaptoheterocyclic compound, (ii) hydrolyzing the resulting 4-heterocyclylthio-1-naphthol compound in the presence of a base to form a reaction product, and (iii) acidifying said reaction product. The resulting compounds are useful as intermediates in the synthesis of bleach accelerator releasing couplers for use in silver halide color photographic materials. |
申请公布号 |
EP0763526(A1) |
申请公布日期 |
1997.03.19 |
申请号 |
EP19950114619 |
申请日期 |
1995.09.18 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
DELPRATO, IVANO;BERTOLDI, MASSIMO |
分类号 |
C07C319/06;C07C323/38;C07C323/42;C07C323/62;C07D257/04;G03C7/305 |
主分类号 |
C07C319/06 |
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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