| 发明名称 |
1:1 Adducts of 1-naphthol and (Na)phthalaldehydic acid |
| 摘要 |
This invention relates to derivatives of phthalaldehydic and naphthalaldehydic acid useful as intermediates in the preparation of pH-sensitive phthalide and naphthalide indicator dyes. One class of intermediates provided by the present invention comprises compounds of the formula:
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| 申请公布号 |
US3976662(A) |
申请公布日期 |
1976.08.24 |
| 申请号 |
US19740456870 |
申请日期 |
1974.04.01 |
| 申请人 |
POLAROID CORPORATION |
发明人 |
KARGER, EVA R.;MACGREGOR, PAUL T. |
| 分类号 |
C09B11/04;G03C8/48;(IPC1-7):C07D311/06 |
主分类号 |
C09B11/04 |
| 代理机构 |
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