Process for the preparation of compounds 2-hidroxifenilalquenilbenzotriazol and process for the preparation of siloxane-containing compounds function 2-hydroxyphenylbenzotriazole

摘要

Process for preparing a compound of 2-hidroxifenilalquenilbenzotriazol, comprising at least the two following chemical steps: 1) etherification is carried out in a compound of 2-hydroxyphenyl benzotriazole in water and / or at least one organic solvent with a boiling point higher 200 ° C by reacting an alkenyl halide in the presence of at least one phase transfer agent and at least one base to obtain the corresponding compound alquenilfenilbenzotriazol 2 -O-; 2) a Claisen rearrangement of the compound 2-O-alquenilfenilbenzotriazol thus obtained is effected by heating the reaction mixture at a temperature above 170 ° C with at least one solvent organize a boiling point greater than 200 ° C.