Patent ID: 9447123
Filing Date: 2016-09-20
CPC Classification: C07D,C07F

Claim Text:
1. A process for preparing a 2-hydroxyphenyl alkenyl benzotriazole compound, the process comprising: 1) reacting a 2-hydroxyphenylbenzotriazole compound in water, at least one organic solvent with a boiling point of greater than 200° C., or both, with an alkenyl halide in the presence of at least one phase-transfer agent and at least one base to obtain a 2-O-alkenylphenylbenzotriazole compound; and 2) heating a reaction mixture comprising the 2-O-alkenylphenylbenzotriazole compound and at least one organic solvent with a boiling point of greater than 200° C. to a temperature above 170° C. to form a 2-hydroxyphenyl alkenyl benzotriazole compound.