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ChemicalBook CAS DataBase List 4,5-DICHLORO-1H-INDOLE-2-CARBOXYLIC ACID
231295-84-4

4,5-DICHLORO-1H-INDOLE-2-CARBOXYLIC ACID synthesis

3synthesis methods
-

Yield:231295-84-4 60%

Reaction Conditions:

with lithium hydroxide in ethanol;

Steps:

72 (4,5-Dichloro-1H-indol-2-yl)-(4-methyl-piperazin-1-yl)-methanone

4,5-Dichloro-1H-indole-2-carboxylic acid ethyl ester (0.5 g) was teated with 1M lithium hydroxide in ethanol (3 mL) and heated, water bath, for 2 h. The solution was acidified with 10% hydrochloric acid, diluted with water and extracted with ethylacetate. The organic extracts were combined, dried over sodium sulfate and filtered, and solvent was evaporated to give 4,5-dichloro-1H-indole-2-carboxylic acid (0.27 g, 60%).

References:

US2003/207893,2003,A1