2-alkenyl-3-aminothiophene derivative and process for...

Details 2-alkenyl-3-aminothiophene derivative and process for... 2-alkenyl-3-aminothiophene derivative and process for...

C - Chemistry, Metallurgy

07

D

C07D 333/36 (2006.01)

Patent

CA 2649506

Disclosed is a method for commercially producing 2-alkenyl-3-aminothiophene derivatives, which are useful as intermediates for agricultural chemicals, at low cost. Specifically disclosed is a method for introducing alkenyl groups into the 2-position of 3-aminothiophene derivatives by reacting 3-aminothiophene derivatives represented by the general formula (2) below or salts thereof with a ketone represented by the general formula (1) below without using a protecting group. Also specifically disclosed are 2-alkenyl-3-aminothiophene derivatives (3a) to (3d) which are useful as intermediates for agricultural chemicals, (see formula 1) (see formula 2) (see formula 3a)(see formula 3b) (see formula 3c) (see formula 3d)

L'invention concerne un procédé permettant de produire à échelle commerciale et à bas coût un dérivé 2-alcényl-3-aminothiophène utile en tant qu'intermédiaire pour la production de produits agrochimiques. L'invention concerne plus spécifiquement un procédé permettant d'introduire un groupe alcényle à la position 2 d'un dérivé 3-aminothiophène, en faisant réagir un dérivé 3-aminothiophène de formule générale (2) ci-dessous ou l'un de ses sels avec une cétone de formule générale (1) ci-dessous, sans utiliser de groupe protecteur. L'invention concerne également spécifiquement des dérivés 2-alcényl-3-aminothiophène (3a) à (3d) utiles en tant qu'intermédiaires pour la production de produits agrochimiques.

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