Journal of Organic Chemistry p. 4076 - 4078 (1983)
Update date:2022-08-11
Topics:
Kagan, Jacques
Arora, Sudershan K.
Uestuenol, Ayse
2,2':5',2''-Terthiophene-5-carboxylic acid was obtained in excellent yield by treating 2,2':5',2''-terthiophene with lithium diisopropylamide, followed by carboxylation of the lithium salt with solid carbon dioxide.The 5,5''-dicarboxylic acid was obtained similarly, when 2 equiv of base were used.Attempted syntheses of the monoacid, based on the oxidation of the corresponding aldehyde or the acetyl derivative, were unsuccessful.Both the monoacid and the 5,5'-diacid sensitized the hemolysis of human erythrocytes in the presence of ultraviolet light.
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