Process for the preparation of benzotriazoles

Details Process for the preparation of benzotriazoles Process for the preparation of benzotriazoles

C - Chemistry, Metallurgy

07

D

C07D 249/20 (2006.01)

Patent

CA 2419459

A process for the preparation of compounds of formula (I): wherein the general symbols are as defined in claim 1, which comprises reacting a compound of formula (V): wherein R1, R2, R3, R4, R5, R6, R7, R8, R9 and R18 are as defined in claim 1, and R18 is especially nitro, chlorine or bromine, with an azide compound of formula (IX): wherein M and n are as defined in claim 1, especially with sodium azide.

L'invention porte sur un procédé de préparation d'un composés de formule (I) dont les symboles généraux sont tels que définis dans la revendication 1, et qui consiste à faire réagir un composé de formule (V), dans laquelle: R¿1?, R¿2?, R¿3?, R¿4?, R¿5?, R¿6?,¿ ?R7, R¿8?, R¿9? et R¿18? sont tels que définis dans la revendication 1, et où R¿18? est spécialement nitro, chlore ou brome, avec un composé azide de formule (IX), dans laquelle M et n sont tels que définis dans la revendication 1, et spécialement avec un azide de sodium.

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