620596-61-4Relevant articles and documents
Preparation method of bis(2,4,6-trimethylbenzoyl)phenyl phosphine oxide
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Paragraph 0096-0099; 0103-0106; 0111-0114; 0118-0121; 0125, (2021/01/11)
The invention provides a preparation method of bis (2,4,6-trimethylbenzoyl)phenyl phosphine oxide, which comprises the following steps: adding a specific ether compound as a complexing agent in the reaction of sodium sand and phenyl phosphine dichloride, and adding the complexing agent to effectively inhibit the formation of phenyl phosphine sodium polyphosphide and promote the generation of phenyl phosphine sodium; a phenyl phosphine hydrogen process is not needed, so that the process cost is reduced, and the safety of the process is improved; besides, the complexing agent is a polar aproticsolvent, is low in dosage, can reduce the content of organic matters in the wastewater compared with a traditional method adopting a protic solvent as an activating agent or a proton source, has certain environmental benefits and saves the cost.
Preparation method of bis(2, 4, 6-trimethylbenzoyl)phenylphosphine oxide
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Page/Page column 6-14, (2020/12/30)
The invention provides a preparation method of bis(2, 4, 6-trimethylbenzoyl)phenylphosphine oxide, which comprises the following steps of (1) mixing sodium sand, phenylphosphine dichloride and urotropine in a non-polar solvent to react to obtain a reactant, and (2) adding mesitylene formyl chloride into the reactant obtained in the step (1), reacting, and oxidizing to obtain bis(2, 4, 6-trimethylbenzoyl)phenylphosphine oxide. According to the method, urotropine is used as an activating agent, sodium phenylphosphine can be effectively prevented from being agglomerated to form sodium phenylphosphine polyphosphide, generation of sodium phenylphosphine is promoted, the hydrogen phenylphosphine process is not needed, and the reaction safety is greatly improved; and the preparation process can be realized by only needing a small amount of activating agent, so that the economical efficiency of industrial production is facilitated, the content of organic matters in the wastewater can be reduced, certain environmental benefits are achieved, and the cost is saved.
Preparation method of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide
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Paragraph 0032; 0034; 0036; 0039; 0040; 0042; 0045; 0046, (2019/10/01)
The invention provides a preparation method of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide. The preparation method comprises the following steps: using phenyl phosphorus dichloride as an initial raw material, under the protection of nitrogen, adopting a catalyst (the catalyst is a mixture of potassium tert-butoxide and serine) to replace chlorine with powdery metal sodium, carrying out reduction under a weak alkaline condition, and carrying out condensation and oxidation reaction with 2,4,6-trimethylbenzoyl chloride to prepare a phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide product. The preparation method of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide has better catalytic effect and higher yield; and the metal sodium is prepared into powder in a toluene solvent, and all reaction processes are carried out under the protection of nitrogen, so that the safety is high.
