Regioselective synthesis of 4-chloro-2-thiophenecarboxylic acid

Details Regioselective synthesis of 4-chloro-2-thiophenecarboxylic acid Regioselective synthesis of 4-chloro-2-thiophenecarboxylic acid

C - Chemistry, Metallurgy

07

F

C07F 7/08 (2006.01) C07D 333/38 (2006.01) C07D 409/06 (2006.01)

Patent

CA 2148616

4-Chloro-2-thiophenecarboxylic acid is made by forming a compound of formula (Ia), wherein R3 is (C1-C6) alkyl, phenyl, or benzyl; covering the compounds to a compound of formula (IVa); and removing the silyl group R3Si-. The product is useful as an intermediate in making pharmaceutical products.

L'acide 4-chloro-2-thiophènecarboxylique est obtenu en formant un composé de formule (Ia), où R3 est un alkyle en C1-C6, un phényle ou un benzyle; en convertissant les composés en un composé de formule (IVa); et en éliminant le groupe silyle R3Si-. Le produit est utile comme intermédiaire pour la fabrication de produits pharmaceutiques.

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