Process for preparing 2-thiophene acetic acid derivatives

C - Chemistry – Metallurgy – 07 – D

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260/329.4

C07D 333/24 (2006.01) C07D 333/12 (2006.01)

Patent

CA 1201442

PRECIS DE LA DIVULGATION: L'invention a pour objet un procédé de prépara- tion de dérivés de l'acide 2-thiophène acétique de formu- le: Image (I) dans laquelle R = alkyle de 1 à 4 atomes de carbone R1, R2, R3 = H, alkyle de 1 à 4 atomes de carbone ou halogène, à partir des produits de formule : Image (II) Ce procédé selon l'invention ne comporte que trois étapes réactionnelles pour l'obtention des produits de formule I qui sont notamment utiles à titre d'intermé- diaires dans la préparation de produits pharmaceutiques, en particulier anti-inflammatoires.

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