China Suppliers > Tianjin Yuansu Chemical Reagent Co., LTD > Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
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- Details for Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
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Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate 84434-11-7
Category : Paint and Coatings/Inks and Printing Oil
CAS NO : 84434-11-7 EC NO : 282-810-6 MF : C18H21O3P MW : 316.3313 Specification : 99% min Packing : 25kg，50kg 200kg Product description : What is the chemical of Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate? Appearance: Yellow oily to viscous liquid Assay： 99% min .by GC IR Identity: conform to standard HNMR： conform to standard carbon spectrum: conform to standard Water by K. F.:0.5% max or as per the customer’s request Loss on drying:0.5% max. or as per the customer’s request ============================================================================= Usage： As a photoinitiator, used in low yellowing and low odor formula systems Application areas: Screen printing ink, offset printing ink, flexographic printing ink, photoresist, topcoat, printing plate materials, etc =========================================================================== Main synthetic routes The synthesis of this compound typically involves a coupling reaction between acyl chloride and phosphinic acid ester. The following are two common laboratory and industrial preparation pathways: 1. Chlorosilane catalyzed coupling method (with many literature reports) This method directly couples acyl chlorides with hydrogen phosphinic esters in the presence of chlorosilanes to generate acylphosphine oxide derivatives. Raw materials: 2,4,6-trimethylbenzoyl chloride (CAS: 5093-94-9) Ethyl phenylphosphinate (CAS: 938-18-1) Reagent/Catalyst: Chlorotrimethylsilane (TMSCl) Triethylamine (Et3N) - as an acid binding agent Solvent: Tetrahydrofuran (THF) Reaction conditions: Step 1: Add TMSCl and triethylamine to THF, and control the temperature to about 60 ° C for overnight reaction. Step 2: Cool down to 25 ° C and continue the reaction overnight. Characteristics: This method has simple steps, good atomic economy, and is suitable for preparing high-purity products. 2. Organic tin catalytic method Using organotin compounds to catalyze the reaction between acyl chlorides and phosphinic esters. Raw materials: 2,4,6-trimethylbenzoyl chloride Phenylphosphonic acid ethyl ester Catalyst: Dibutyltin dilaurate Reaction conditions: React at 60 ° C for about 2 hours. Characteristic: Fast reaction speed, but requires handling of tin containing by-products. Key intermediates description 2,4,6-trimethylbenzoyl chloride: can be prepared by reacting 2,4,6-trimethylbenzoic acid (trimethylbenzoic acid) with thionyl chloride (SOCl2) or oxalyl chloride. Phenylphosphonic acid ethyl ester: can be prepared by reacting phenyldichlorophosphine with ethanol or through other phosphorus chemical pathways. Uses : As a photoinitiator, used in low yellowing and low odor formula systems Application areas: Screen printing ink, offset printing ink, flexographic printing ink, photoresist, topcoat, printing plate materials, etc Synonyms : Photoinitiator-TPO-L;ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate;Photoinitiator TPO-L;2,4,6-Trimethylbenzoyldi-Phenylphosphinate; Molecular Structure : 
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Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate