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US 6,310,238 B1Granted
O-amino(thio)phenolcarboxylic acids, and their preparation
AssigneeSiemens Aktiengesellschaft
InventorsRecai Sezi, Michael Keitmann
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Abstract
The invention relates to novel o-aminophenolcarboxylic acids or o-aminothiophenolcarboxylic acids of the following structure in which: A1 to A7 are—independently of one another—H, CH3, OCH3, CH2CH3 or OCH2CH3; T is O or S, and m is 0 or 1; Z is a carbocyclic or heterocyclic aromatic radical.
Claims11
An o-aminophenolcarboxylic acid or o-aminothiophenolcarboxylic acid of the structure
- in which:
- each of A1 to A7 is a ring substituent independently selected from H, CH3, OCH3, CH2CH3 or OCH2CH3;
- T is O or S, and m is 1;
- Z is one of the following carbocyclic aromatic radicals:
- wherein Q=C—A, and A=H, F, (CH2)pCH3, (CF2)pCF3, O(CH2)pCH3, O(CF2)pCF3, CO(CH2)pCH3, CO(CF2)pCF3 where p=0 to 8 (linear or branched chain), OC(CH3)3, OC(CF3)3, C6H5, C6F5, OC6H5, OC6F5, cyclopentyl, perfluorocyclopentyl, cyclohexyl or perfluorocyclohexyl,
- M=a single bond, (CH2)n, (CF2)n, CH(CH3), CH(CF3), CF(CH3), CF(CF3), C(CH3)2, C(CF3)2, CH(C6H5), CH(C6F5), CF(C6H5), CF(C6F5), C(CH3)(C6H5), C(CH3)(C6F5), C(CF3)(C6H5), C(CF3)(C6F5), C(CH5)2, C(C6F5), CO, SO2,
3 more elements
Dependencies are inferred from the claim text.