- Synthesis method of 1-phenyl-1,2-propanedione-2-(O-ethoxycarboxy) oxime serving as photoinitiator
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The invention relates to a novel synthesis process of 1-phenyl-1,2-propanedione-2-(O-ethoxycarboxy) oxime serving as a photoinitiator. The synthesis process comprises the following steps: performing reaction on propiophenone serving as a start raw material and mitrous ether under the action of hydrogen chloride, thus obtaining 1-phenyl-1,2-propanedione-2-oxime; and further performing reaction on the 1-phenyl-1,2-propanedione-2-oxime and ethyl chloroformate under the action of anhydrous potassium carbonate or triethylamine, thus obtaining the 1-phenyl-1,2-propanedione-2-(O-ethoxycarboxy) oxime (PDO). According to the synthesis process, the influence of the hydrogen chloride on the production of the 1-phenyl-1,2-propanedione-2-oxime and the influence of the anhydrous potassium carbonate or triethylamine serving as an acid-binding agent on the production of the 1-phenyl-1,2-propanedione-2-(O-ethoxycarboxy) oxime during the reaction are inspected, optimal conditions for producing the 1-phenyl-1,2-propanedione-2-oxime and the 1-phenyl-1,2-propanedione-2-(O-ethoxycarboxy) oxime is determined, and a novel process which is easy to operate and environmentally-friendly is provided.
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Paragraph 0020
(2017/07/21)
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