Process for preparing benzo[1,2-b
The invention relates to a process for preparing benzo[1,2-b;4,5-b']dithiophene-4,8-dicarboxylic acid or its 2,3-dihydro derivative, and to novel products prepared by this process which comprises the following steps: A) heating benzo[1,2-b;4,5-b']dithiophene-4,4,8,8-tetracarboxylic acid, o...
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| Format: | Patent |
| Sprache: | chi ; eng |
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