| 摘要 |
An intermediate for preparing (meth)acrylated photoinitiators according to Formula (I):;
wherein:
R1 is selected from the group consisting of hydrogen and a methyl group;A represents a group including at least one photoinitiating moiety;L represents a n+o-valent linking group including at least one carbon atom;n and o each independently represent an integer from 1 to 4;p is equal to 0 or 1;X represents a group selected from the group consisting of Cl, Br, I, and R2SO3; and
R2 represents an optionally substituted group selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an alkaryl group, an aralkyl group, an aryl group and a heteroaryl group. Also, a method for the preparation of (meth)acrylated photoinitiators by β-elimination of HX from the intermediate according to Formula (I). |
| 主权项 |
1. A method for the preparation of (meth)acrylated photoinitiators comprising the steps of:
A) preparing an intermediate according to Formula (I) by reacting a starting material according to Formula (II) with an acid chloride according to Formula (III) in an aprotic solvent using an inorganic base or a salt of a carboxylic acid: wherein: R1 is selected from the group consisting of hydrogen and a methyl group; A represents a group including at least one photoinitiating moiety selected from the group consisting of benzil ketals, α,α-dialkoxyacetophenones, α-hydroxyalkylphenones, α-aminoalkylphenones, acylphosphine oxides, bis-acylphosphine oxides, acylphosphine sulfides, α-haloketones, α-halosulfones, phenylglyoxalates, benzophenones, thioxanthones, and 1,2-diketones; L represents a n+o-valent linking group including at least one carbon atom; n and o each independently represent an integer from 1 to 4; p is equal to 0 or 1; X represents a group selected from the group consisting of Cl, Br, I, and R2SO3; and R2 represents an optionally substituted group selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an alkaryl group , an aralkyl group, an aryl group, and a heteroaryl grou; andB) forming a (meth)acrylated photoinitiator by β-elimination of HX from the intermediate according to Formula (I). |
