Process for the preparation of thiazole derivatives

Details Process for the preparation of thiazole derivatives Process for the preparation of thiazole derivatives

C - Chemistry, Metallurgy

07

D

C07D 277/32 (2006.01) C07D 277/16 (2006.01) C07D 277/36 (2006.01) C07D 417/06 (2006.01)

Patent

CA 2274177

The invention relates to a process for the preparation of a compound of formula (I), wherein Q, Y, Z, R1, R2, R3, R4 and R5 are as defined in the specification, which comprises a) reacting a compound of formula (II), with a halogenating agent to form a compound of formula (III), or b) converting a compound of formula (II) by means of a halogenating agent into a compound of formula (IV); optionally c) converting the compound of formula (IV) into a compound of formula (III); d) converting a compound of formula (III) by means of a compound of formula (V) into a compound of formula (VI); or e) converting a compound (IV) by means of a compound (V) into a compound (VI); and f) converting a compound (VI) by means of a chlorinating agent into a compound (I); a compound (IV); to a process for the preparation of a compound (III) and to a process for the preparation of a compound (IV).

La présente invention a trait à un procédé destiné à la préparation d'un composé de formule (I) où Q, Y, Z, R1, R2, R3, R4 et R5 sont conformes aux désignations spécifiées, qui consiste à: a) faire réagir un composé de formule (II) avec un agent halogénant pour former un composé de formule (III), ou bien b) transformer un composé de formule (II) en un composé de formule (IV) au moyen d'un agent halogénant; et éventuellement c) transformer le composé de formule (IV) en un composé de formule (III); d) transformer le composé de la formule (III) en un composé de formule (VI) au moyen d'un composé de formule (V); e) transformer un composé de formule (IV) en un composé de formule (VI) au moyen d'un composé de formule (V), et f) transformer un composé de formule (VI) en un composé de formule (I) au moyen d'un agent de chloration. L'invention a également trait à un procédé de préparation d'un composé de formule (III) et à un procédé de préparation d'un composé de formule (IV).

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