A process for the preparation of polytriazine products...

C - Chemistry – Metallurgy – 08 – G

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C08G 73/06 (2006.01) C07D 251/44 (2006.01) C07D 401/14 (2006.01) C08K 5/3492 (2006.01)

Patent

CA 2239139

A process for the preparation of a product corresponding to the formula (I) Image wherein n is a number from 2 to 50; the radicals R1 are for example 2,2,6,6-tetramethyl-4-piperidyl, R2 is for example hexamethylene and E is for example t-octylamino; which comprises a) reacting a compound of the formula (A) Image with a compound of the formula (B) Image in a molar ratio of 1:1.7 to 1:4; and b) reacting the product obtained in a) with a compound of the formula (C) Image to obtain the product corresponding to the formula (I), the molar ratio of the compound of the formula (C) to the compound of the formula (A) being 2:1 to 1:5; the reactions a) and b) being carried out in an organic solvent, in the presence of an inorganic base and in an inert atmosphere.

Divulgation d'un procédé de préparation d'un produit correspondant à la formule (I) Image , dans laquelle n est un nombre compris entre 2 et 50 inclusivement; les radicaux R1 sont, par exemple, le 2,2,6,6-tétraméthyl-4-pipéridyle, R2 est, par exemple, l'hexaméthylène et E est, par exemple, le t-octylamino; qui comprend a) la réaction du composé de formule (A) Image avec le composé de formule (B) Image , dans un rapport molaire allant de 1:1,7 à 1:4; et b) la réaction du produit obtenu en a) avec un composé de formule (C) Image , afin d'obtenir le produit correspondant à la formule (I), le rapport molaire des composés de formule (C) et (A) étant de 2:1 à 1:5; les réactions a) et b) se déroulant dans un solvant organique, en présence d'une base inorganique et dans une atmosphère inerte.

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