638-53-9Relevant articles and documents
2,2':5',2''-Terthiophene-5-carboxylic Acid and 2,2':5',2''-Terthiophene-5,5''-dicarboxylic Acid
Kagan, Jacques,Arora, Sudershan K.,Uestuenol, Ayse
, p. 4076 - 4078 (1983)
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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Drahowzal
, p. 767,772 (1951)
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Ruthenium-catalysed hydroxycarbonylation of olefins
Dühren, Ricarda,Kucmierczyk, Peter,Jackstell, Ralf,Franke, Robert,Beller, Matthias
, p. 2026 - 2030 (2021/04/09)
State-of-the-art catalyst systems for hydroxy- and alkoxycarbonylations of olefins make use of palladium complexes. In this work, we report a complementary ruthenium-catalysed hydroxycarbonylation of olefins applying an inexpensive Ru-precursor (Ru3(CO)12) and PCy3as a ligand. Crucial for the success of this transformation is the use of hexafluoroisopropanol (HFIP) as the solvent in the presence of an acid co-catalyst (PTSA). Overall, moderate to good yields are obtained using aliphatic olefins including the industrially relevant substrate di-isobutene. This atom-efficient catalytic transformation provides straightforward access to various carboxylic acids from unfunctionalized olefins.
Synthetic method of terminal carboxylic acid
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Paragraph 0043-0046, (2019/11/21)
The invention discloses a synthetic method of a terminal carboxylic acid. The synthetic method is characterized by comprising the steps of adding an olefin represented by a formula (3) shown in the description, formic acid, acetic anhydride, Pd(OAc)2 and a monophosphorus ligand TFPP into an organic solvent in a proportion, carrying out hydrogen carbonylation reaction on the olefin represented by the formula (3) shown in the description, formic acid and acetic anhydride at 80-90 DEG C for 48h-72h under the catalysis of the metal palladium salt Pd(OAc)2 and the monophosphorus ligand TFPP so as to obtain the terminal carboxylic acid represented by a formula shown in the description, and separating a target product, namely the terminal carboxylic acid after the reaction is finished, wherein olefin represented by the formula (3) is selected from cycloolefins, or linear olefins of which the R1 is electron donating groups. By virtue of the method disclosed by the invention, corresponding terminal carboxylic acid and a derivative thereof can be prepared through the reaction under mild conditions of low temperature and no high pressure; and the steps of the synthetic method are simple and convenient, the operation is convenient, the yield is high, the energy source can be greatly saved, and the synthetic efficiency can be greatly improved.