Sulfuric Acid → HCID 68720633, compound

Participants

Reaction Conditions

Reaction Steps

17 g of LiCl were dissolved in 250 ml of dimethylformamide in a 2 l stirred flask fitted with internal thermometer and condenser. A solution of 86 g of ethyl trimethylbenzoylphenylphosphinate in 50 ml of DMF was subsequently added dropwise over the course of one hour. The reaction mixture was subsequently stirred overnight at 65° C. 850 ml of ice-water were added dropwise to the mixture, giving a slightly cloudy solution. After warming to 35° C., 450 ml of 0.5 M H2SO4 were added until a pH of 1.5-2 had been reached, whereupon colorless crystals were precipitated. Stirring was continued at 5° C. for one hour. The crystals were filtered off and washed twice with 200 ml of water each time. Drying gave 71.7 g of 98% pure trimethylbenzoylphenylphosphinic acid (HPLC).

Provenance & Evidence